9 Database Properties

Database properties help you to view and control the behavior of databases, redo transport services, and log apply services in a broker configuration. This chapter provides the following sections about the monitorable and configurable properties:

The scope of some properties is said to be database-wide. If the database (primary or standby) is a RAC database consisting of multiple instances, the value of such a property applies uniformly across all of the instances sharing that database. The scope of other properties is said to be instance-specific. Such a property exists for all instances of the RAC database, but its value may differ from one specific instance to another.

Note:

This chapter presents properties primarily from the point of view of the Data Guard command-line interface (DGMGRL). Using DGMGRL, the properties described in this chapter may be viewed or modified using discrete DGMGRL commands.

Enterprise Manager explicitly presents some of these properties on the Edit Properties page. Information from other properties may be implicitly incorporated into other Web pages displayed by Enterprise Manager. Each property's description in this chapter indicates how Enterprise Manager presents that property.

9.1 Monitorable (Read-Only) Database Properties

Monitorable properties allow you to view information related to the database or the instance, but you cannot change the values of these properties. You can view all of the monitorable properties using the DGMGRL SHOW commands.

Note:

Information for monitorable properties can be seen only when broker management of the database is enabled and the database is in an online state. Enterprise Manager displays the information obtained from these properties on the Property page.

If the database is a RAC database, the output values of some properties may also show instance-specific information. For example if the primary database is a RAC database, LogXptStatus may show Instance1 transmitting redo data to Standby2 has an error and Instance2 transmitting redo data to Standby4 has an error.

The following sections describe the database monitorable properties:

9.1.1 InconsistentLogXptProps (Inconsistent Redo Transport Properties)

The InconsistentLogXptProps property returns a table that shows all properties related to redo transport services whose values are inconsistent between the broker configuration file and the runtime value in the database.

The properties reported in this table can be either database-specific properties or instance-specific properties. A database-specific property only ensures that there is one value in the broker's configuration file for all instances sharing the database, but the runtime values among the instances can be different. This means that a database-specific property may be inconsistent only on some instances.

This property pertains to the primary database. The table contains the following columns:

  • INSTANCE_NAME

    The value matching the SID for the instance.

  • STANDBY_NAME

    The database unique name (DB_UNIQUE_NAME) of the standby database to which this redo transport services property pertains.

  • PROPERTY_NAME

    The name of the redo transport services property with an inconsistent value.

  • MEMORY_VALUE

    The runtime value being used in the database.

  • BROKER_VALUE

    The value of the redo transport services property saved in the broker configuration file.

9.1.2 InconsistentProperties (Inconsistent Database Properties)

The InconsistentProperties property returns a table that shows all database properties whose values contained in the broker configuration file are inconsistent with the values in the corresponding server parameter file or the runtime values in the database.

The properties reported in this table can be either database-specific properties or instance-specific properties. A database-specific property only ensures that there is one value in the broker's configuration file for all instances sharing the database, but the runtime memory values or SPFILE values among the instances can be different. This means that a database-specific property may be inconsistent only on some instances.

Each individual database has this property. The table contains the following columns:

  • INSTANCE_NAME

    The value matching the SID for the instance.

  • PROPERTY_NAME

    The name of the database property with the inconsistent value.

  • MEMORY_VALUE

    The corresponding runtime value being used in the database.

  • SPFILE_VALUE

    The corresponding value saved in the server parameter file (SPFILE).

  • BROKER_VALUE

    The value of the database property saved in the broker configuration file.

9.1.3 LogXptStatus (Redo Transport Status)

The LogXptStatus property returns a table that contains the error status of redo transport services for each of the enabled standby databases. This property pertains to the primary database.

The table contains the following columns:

  • PRIMARY_INSTANCE_NAME

    The value matching the SID for the instance on the primary database.

  • STANDBY_DATABASE_NAME

    The database unique name (DB_UNIQUE_NAME) of the standby database.

  • ERROR

    The text of the redo transport error. If there is no error, the field is empty.

Each entry in the table indicates the status of redo transport services on one primary instance to one standby database.

The format of the error status is as follows:

"standby1_sitename=error_status, standby2_sitename=error_status,..."

The error status can be an empty string, which indicates there is no error.

In the following example, the STATUS from DR_Sales is empty because there is no error for the DR_Sales destination. The South_Report destination returned the ORA-01034 message.

DGMGRL> SHOW DATABASE 'North_Sales' 'LogXptStatus' ;
LOG TRANSPORT STATUS
PRIMARY_INSTANCE_NAME STANDBY_DATABASE_NAME               STATUS
             sales1            DR_Sales
             sales1        South_Report      ORA-01034: ORACLE not available

9.1.4 LsbyFailedTxnInfo (Logical Standby Failed Transaction Information)

The LsbyFailedTxnInfo property identifies a failed transaction that caused log apply services to stop. This property contains a string with the following values from the DBA_LOGSTDBY_EVENTS view:

  • XIDUSN: Transaction ID undo segment number

  • XIDSLT: Transaction ID slot number

  • XIDSQN: Transaction ID sequence number

  • STATUS_CODE: Status (or Oracle error code) belonging to the STATUS message

  • STATUS: Description of the current activity of the process or the reason why log apply services stopped

The transaction IDs and status information are separated by a string of number signs (###). This property pertains to a logical standby database.

9.1.5 LsbyParameters (Logical Standby Parameters)

The LsbyParameters property contains a string that identifies the value of MAX_SGA (maximum system global area) and MAX_SERVERS (maximum number of parallel query servers) specifically reserved for log apply services. These values are separated by a string of number signs (###) in the LsbyParameters property.

This property pertains to a logical standby database.

9.1.6 LsbySkipTable (Logical Standby Skip Table)

The LsbySkipTable property lists the SQL Apply skip specifications. These skip specifications specify filters for SQL Apply to skip applying a certain class of online redo log files on the logical standby database. This property returns a table with the following columns from the DBA_LOGSTDBY_SKIP view:

  • ERROR

    Indicates if the statement should be skipped (Y) or if errors should be returned for the statement (N)

  • STATEMENT_OPT

    Indicates the type of statement that should be skipped

  • SCHEMA

    The schema name for which this skip option should be used

  • NAME

    Name of the object for which this skip option should be used

  • PROCEDURE

    Name of the stored procedure to execute when processing the skip option

9.1.7 LsbySkipTxnTable (SQL Apply Skip Transaction Table)

The LsbySkipTxnTable lists the skip settings chosen. This property returns a table with following columns:

  • XIDUSN: Transaction ID undo segment number

  • XIDSLT: Transaction ID slot number

  • XIDSQN: Transaction ID sequence number

  • ACTIVE: Description of the current activity of the process or the reason why SQL Apply stopped

This property pertains to SQL Apply.

9.1.8 RecvQEntries (Receive Queue Entries)

The RecvQEntries property returns a table indicating all log files that were received by the standby database but have not yet been applied. If no rows are returned, it implies all log files received have been applied. This property pertains to a standby database.

The table contains the following columns in the order shown:

  • STATUS

    The STATUS column is set to one of the following values for a log file on a logical standby database:

    • NOT_APPLIED: No redo records in this log file have been applied.

    • PARTIALLY_APPLIED: Some of the redo records in this log file have been applied while others have not.

    • COMMITTED_TRANSACTIONS_APPLIED: This status value only applies to a logical standby database. All redo records belonging to the committed transactions have been applied. Redo records belonging to uncommitted transactions have not been read by LogMiner and may still be needed when the transactions are committed in the future. Therefore, it is not safe yet to discard this online redo log file.

  • RESETLOGS_ID

    Resetlogs identifier associated with the archived redo log file

  • THREAD

    The redo thread number

  • LOG_SEQ

    The online redo log file sequence number

  • TIME_GENERATED

    The first time when the online redo log file was written to the primary database

  • TIME_COMPLETED

    The next time when the log file was archived on the primary database (corresponds to the NEXT_CHANGE# column)

  • FIRST_CHANGE#

    First change number in the archived redo log file

  • NEXT_CHANGE#

    First change in the next log file

  • SIZE (KBs)

    The SIZE of the online redo log file in kilobytes

For example:

DGMGRL> SHOW DATABASE 'DR_Sales' 'RecvQEntries' ;
              STATUS     RESETLOGS_ID           THREAD
LOG_SEQ          TIME_GENERATED       TIME_COMPLETED    FIRST_CHANGE#
NEXT_CHANGE#        SIZE (KBs)
         NOT_APPLIED        497198843                1                    5
06/20/2003 14:55:38  06/20/2003 16:31:26           202138
210718             7364
         NOT_APPLIED        497198843                1                    6
06/20/2003 16:31:26  06/20/2003 16:31:39           210718
210753               13
         NOT_APPLIED        497198843                1                    7
06/20/2003 16:31:39  06/20/2003 16:31:54           210753
210758                1
         NOT_APPLIED        497198843                1                    8
06/20/2003 16:31:54  06/20/2003 16:31:59           210758
210789               11

Note:

Enterprise Manager displays this information on the Log File Details page.

9.1.9 SendQEntries (Send Queue Entries)

The SendQEntries property returns a table that shows all log files on the primary database that were not successfully archived to one or more standby databases. This property pertains to the primary database.

The table contains the following columns:

  • STANDBY_NAME

    The value can be empty or it can contain the database unique name (DB_UNIQUE_NAME) of the standby database. If empty, the STATUS column will contain a value of CURRENT or NOT_ARCHIVED.

  • STATUS

    The STATUS column is set to one of the following values:

    • CURRENT: A log file to which online redo is currently being written.

    • NOT_ARCHIVED: A completed online redo log file that has not been archived locally.

    • ARCHIVED: A completed log file that has been archived locally but has not been transmitted to the standby database specified in the STANDBY_NAME column.

    The table contains exactly one row with the value of STATUS=CURRENT. There can be multiple rows with the value STATUS=ARCHIVED or STATUS=NOT_ARCHIVED.

  • RESETLOGS_ID

    Resetlogs identifier associated with the archived redo log file

  • THREAD

    The redo thread number.

  • LOG_SEQ

    The log sequence number. Multiple rows may have the same LOG_SEQ value (for different STANDBY_NAME values).

  • TIME_GENERATED

    The first time when the online redo log file was written to the primary database.

  • TIME_COMPLETED

    The next time when the log file was archived on the primary database (corresponds to the NEXT_CHANGE# column).

  • FIRST_CHANGE#

    First change number in the archived redo log file.

  • NEXT_CHANGE#

    First change in the next log file.

  • SIZE (KBs)

    The SIZE of the online redo log file in kilobytes.

For example, the following shows output from a SHOW DATABASE command:

DGMGRL> SHOW DATABASE 'North_Sales' 'SendQEntries' ;
PRIMARY_SEND_QUEUE
        STANDBY_NAME       STATUS     RESETLOGS_ID
THREAD              LOG_SEQ       TIME_GENERATED       TIME_COMPLETED
FIRST_CHANGE#     NEXT_CHANGE#       SIZE (KBs)
       sales1     ARCHIVED        497198843
1                    9  06/20/2003 16:31:59  06/20/2003 16:39:57
210789           211411              186
       sales1     ARCHIVED        497198843
1                   10  06/20/2003 16:39:57  06/20/2003 16:40:01
211411           211415                1
       sales1     ARCHIVED        497198843
1                   11  06/20/2003 16:40:01  06/20/2003 16:40:07
211415           211418                1
                          CURRENT        497198843
1                   12  06/20/2003 16:40:07
211418                                 1

Note:

Enterprise Manager displays this information on the Log File Details page.

9.1.10 StatusReport (Status Report)

The StatusReport property returns a table that provides a list of errors or warnings about the status of the database. In a RAC database environment, it also includes the status of all running instances. Each individual database has this property. The table contains the following columns in the order shown:

  • INSTANCE_NAME

    The value matching the SID for the instance.

  • ERROR_TEXT

    Formatted error text.

  • SEVERITY

    The severity of the error message. The value is either WARNING or ERROR.

For example, the following shows output from a SHOW DATABASE command:

DGMGRL> SHOW DATABASE 'North_Sales' 'StatusReport' ;
STATUS REPORT
       INSTANCE_NAME   SEVERITY ERROR_TEXT
             sales1      ERROR ORA-16737: the redo transport service for
standby "DR_Sales" has an error
                   *      ERROR ORA-16745: unable to add DB_UNIQUE_NAME DR_Sales
into The DG_CONFIG list because it is full

9.1.11 TopWaitEvents

Specifies the 5 events with the longest waiting time in the specified instance. The events and their waiting time are retrieved from V$SYSTEM_EVENT. Each instance in the configuration has this property. This property is an instance level monitorable property. The table contains the following columns in the order shown:

  • Event

    The system wait event.

  • Wait Time

    The total amount of time waited for this event in hundredths of a second.

See Also:

See Oracle Database Reference for detailed explanations of all system wait events.

The following example shows output from a SHOW INSTANCE command:

DGMGRL> SHOW INSTANCE sales1 'TopWaitEvents';
TOP SYSTEM WAIT EVENTS
               Event            Wait Time
   rdbms ipc message               671350
SQL*Net message from client         62390
          pmon timer                47897
  Queue Monitor Wait                43016
 wakeup time manager                38508

9.2 Configurable Database Properties

Configurable database properties control the behavior of databases in a broker configuration. You can view and dynamically update the values of these properties using either DGMGRL or Enterprise Manager. However, some properties can only be updated through DGMGRL.

In most cases, the configurable database property is said to have database scope; meaning the value you set for the property applies uniformly to each instance of the database. However, in a few cases, the configurable database property is said to have instance scope; meaning, for a multiple-instance database environment, it is possible that the values of some particular properties may differ from one instance of the database to the next. Table 9-1 lists each configurable database property and indicates if the scope of the property is database-wide or instance-specific. If the Scope column contains:

  • Database—The value of the property is database wide, not instance or configuration specific.

  • Instance—The value of the property is instance specific, not database or configuration specific.

  • Configuration—The value of the property is configuration wide, not instance or database specific.

Table 9-1 Configurable Properties

Configurable Property Name Scope Pertains To

AlternateLocation

Instance

Redo transport services

ApplyInstanceTimeout

Database

Redo Apply and SQL Apply

ApplyParallel

Database

Redo Apply

ArchiveLagTarget

Database

Redo transport services

Binding

Database

Redo transport services

DbFileNameConvert

Database

Redo transport services

DelayMins

Database

Redo Apply and SQL Apply

Dependency

Database

Redo transport services

FastStartFailoverTarget

Database

Fast-start failover

FastStartFailoverThreshold

Configuration

Fast-start failover

HostName

Instance

Instance identification

InitialConnectIdentifier

Database

Broker communication

LocalListenerAddress

Instance

Broker communication

LogArchiveFormat

Instance

Redo transport services

LogArchiveMaxProcesses

Database

Redo transport services

LogArchiveMinSucceedDest

Database

Redo transport services

LogArchiveTrace

Instance

Diagnosis

LogFileNameConvert

Database

Redo transport services

LogShipping

Database

Redo transport services

LogXptMode

Database

Redo transport services

LsbyASkipCfgPr

Database

SQL Apply

LsbyASkipErrorCfgPr

Database

SQL Apply

LsbyASkipTxnCfgPr

Database

SQL Apply

LsbyDSkipCfgPr

Database

SQL Apply

LsbyDSkipErrorCfgPr

Database

SQL Apply

LsbyDSkipTxnCfgPr

Database

SQL Apply

LsbyMaxEventsRecorded

Database

SQL Apply

LsbyMaxSga

Instance

SQL Apply

LsbyMaxServers

Instance

SQL Apply

LsbyRecordAppliedDdl

Database

SQL Apply

LsbyRecordSkipDdl

Database

SQL Apply

LsbyRecordSkipErrors

Database

SQL Apply

LsbyTxnConsistency

Database

SQL Apply

MaxConnections

Database

Primary

MaxFailure

Database

Redo transport services

NetTimeout

Database

Redo transport services

PreferredApplyInstance

Database

Redo Apply and SQL Apply

ReopenSecs

Database

Redo transport services

SidName

Instance

Instance identification

StandbyArchiveLocation

Instance

Redo transport services

StandbyFileManagement

Database

Redo Apply and SQL Apply


See Also:

Chapter 4 for more information about database property management

Note:

When a broker configuration with its primary database is created and standby databases are added to the configuration, the broker imports existing settings from the databases to set many of the properties. If importing an existing setting fails, or if a property value is not imported, then the broker uses a broker default value. The default values and whether or not a property is imported is indicated within each property description.

9.2.1 AlternateLocation

Specifies an alternate disk location to store the archived redo log files in the standby when the location specified by the StandbyArchiveLocation fails. The property has an instance scope, and the location it specifies has to be accessible by the instance.

Category Description
Datatype String
Valid values Directory specification on system where the standby instance is located
Broker default Empty string
Imported? No
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical or logical
Corresponds to ...
  • On the standby instance, the LOCATION attribute for the LOG_ARCHIVE_DEST_n initialization parameter that represents an alternate destination of the local destination that matches the property StandbyArchiveLocation
  • On the primary database, the TEMPLATE attribute for the LOG_ARCHIVE_DEST_n initialization parameter that represents an alternate destination

Scope Instance
Enterprise Manager name Alternate Standby Location

Footnote 1 Although this property is set for the standby instance, it is indirectly related to redo transport services for the primary database. The broker sets up both an alternate local destination on the standby instance and an alternate remote destination on the primary database.

Note:

On a logical standby database, Oracle recommends the LOCATION attribute of the LOG_ARCHIVE_DEST_n initialization parameter for the local destination be different from the value of AlternateLocation property.

9.2.2 ApplyInstanceTimeout

Specifies the number of seconds the broker waits after detecting the current apply instance failed and before initiating the apply instance failover.

Category Description
Datatype Integer
Valid values >=0 (seconds)
Broker default 0 (results in immediate apply instance failover)
Imported? No
Parameter class Not applicable
Role Standby
Standby type Physical or logical
Corresponds to ... Not applicable
Scope Database
Enterprise Manager name Not applicable

9.2.3 ApplyParallel

Specifies whether Redo Apply should use multiple processes to apply redo data to the physical standby database. If Redo Apply is offline, then setting the property has no immediate effect. However, when Redo Apply is online again, the value of the property is used to determine the parallel apply behavior of Redo Apply.

Category Description
Datatype String
Valid values
  • AUTO—the number of parallel processes used for Redo Apply is automatically determined by Oracle based on the number of CPUs that the system has.
  • NO—no parallel apply.

Broker default AUTO
Imported? No
Parameter class Not applicable
Role Standby
Standby type Physical
Corresponds to ...
  • AUTO corresponds to the PARALLEL clause of the ALTER DATABASE RECOVER MANAGED STANDBY DATABASE statement
  • NO corresponds to the NOPARALLEL clause of the ALTER DATABASE RECOVER MANAGED STANDBY DATABASE statement

Scope Database
Enterprise Manager name Not applicable

9.2.4 ArchiveLagTarget

Limits the amount of data that can be lost and effectively increases the availability of the standby database by forcing a log switch after the amount of time you specify (in seconds) elapses. That way, the standby database will not miss redo records generated from a time range longer than the value set for the ARCHIVE_LAG_TARGET initialization parameter.

Category Description
Datatype Number
Valid values Seconds (either 0 seconds, or any number from 60 to 7200 seconds)
Broker default 0 (disabled)
Imported? Yes, from the ARCHIVE_LAG_TARGET initialization parameter
Parameter class Dynamic
Role Primary
Standby type Not applicable
Corresponds to ... ARCHIVE_LAG_TARGET=seconds initialization parameter
Scope Database
Enterprise Manager name Archive Lag Target

9.2.5 Binding

Specifies whether or not the standby destination is MANDATORY or OPTIONAL.

Category Description
Datatype String
Valid values
  • MANDATORY

    You can specify a policy for reuse of online redo log files using the MANDATORY value. If the archiving operation of a mandatory destination fails, online redo log files cannot be overwritten.

  • OPTIONAL

    You can specify a policy for reuse of online redo log files using the OPTIONAL value. If the archiving operation of an optional destination fails, the online redo log files are overwritten.

Broker default OPTIONAL
Imported? Yes, from the BINDING column of the V$ARCHIVE_DEST view of the primary database
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical and logical
Corresponds to ...
  • MANDATORY and OPTIONAL attributes for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
  • BINDING column of the V$ARCHIVE_DEST view of the primary database

Scope Database
Enterprise Manager name Not applicable

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.6 DbFileNameConvert

Distinguishes standby datafile filenames from primary datafile filenames. You must set this property on all standby databases. If you add a datafile to the primary database, this property converts the datafile name on the primary database to the datafile on the standby database.

This property is used in the following situations:

  • At standby mount time, it is used to rename primary datafile filenames to standby datafile filenames if the datafile file path on the standby system is different from the primary database system.

  • When a new data file is created on the primary database, a corresponding new data file will be created on the standby database if the StandbyFileManagement property is set to 'AUTO'. Oracle uses the data-file file-path mapping information from the DbFileNameConvert property to determine the standby file path of the new standby data file. If the StandbyFileManagement property is set to 'MANUAL', you must add a corresponding file to the standby database.

    Category Description
    Datatype String
    Valid values Set the value of this property to a list of string pairs:
    1. The first string is the substring found in the datafile names on the primary database.

    2. The second string is the substring found in the datafile names on the standby database.

    For example, ('string1', 'string2', 'string3', 'string4',...)

    Where:

    • string1 is the substring of the primary database filename.

    • string2 is the substring of the standby database filename.

    • string3 is the substring of the primary database filename.

    • string4 is the substring of the standby database filename.

    Broker default ' '
    Imported? Yes, from the DB_FILE_NAME_CONVERT initialization parameter
    Parameter class Static
    Role Standby
    Standby type Physical
    Corresponds to ... DB_FILE_NAME_CONVERT initialization parameter
    Scope Database
    Enterprise Manager name DB File Name Convert

9.2.7 DelayMins

Specifies the number of minutes log apply services will delay applying the archived redo log files on the standby database. When the DelayMins property is set to the default value of 0 minutes, log apply services apply redo data as soon as it is received, using real-time apply if the standby database is configured with standby redo logs.

If the DelayMins property is set to 0 and standby redo logs are configured on the standby database, start log apply services as follows:

  • Start Redo Apply on physical standby databases using the following SQL statement:

    ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE;
    
    
  • Start SQL Apply on logical standby databases using the following SQL statement:

    ALTER DATABASE START LOGICAL STANDBY APPLY IMMEDIATE;
    
    

If the DelayMins property is set to 0 but standby redo logs are not configured on the standby database, start log apply services as follows:

  • Start Redo Apply on physical standby databases using the following SQL statement:

    ALTER DATABASE RECOVER MANAGED STANDBY DATABASE NODELAY;
    
    
  • Start SQL Apply on logical standby databases using the following SQL statement:

    ALTER DATABASE START LOGICAL STANDBY APPLY NODELAY;
    
    
Category Description
Datatype Integer
Valid values >=0 (minutes)
Broker default 0
Imported? Yes, from the DELAY_MINS column of the V$ARCHIVE_DEST view of the primary database
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical and logical
Corresponds to ...
  • DELAY attribute for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
  • DELAY_MINS column of the V$ARCHIVE_DEST view of the primary database

  • Options used to start Redo Apply and SQL Apply

Scope Database
Enterprise Manager name Apply Delay (mins)

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.8 Dependency

Specifies the database unique (DB_UNIQUE_NAME) name (can be the primary or a standby database name) on which this database depends for receiving archived redo log files.

Category Description
Datatype String
Valid values Database unique name (DB_UNIQUE_NAME), except for the standby database itself, or you can set this property to an empty string.
Broker default ' '
Imported? No
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical or logical
Corresponds to ... DEPENDENCY attribute for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
Scope Database
Enterprise Manager name Not applicable

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.9 FastStartFailoverTarget

Specifies the DB_UNIQUE_NAME of the database that will be the target of a fast-start failover when this database is the primary database. See Step 2 in Section 5.5.2 for more information about setting this property.

Category Description
Datatype String
Valid Values DB_UNIQUE_NAME of the database that is the target of the fast-start failover.
Broker default If only one standby database exists, then the broker selects that as the default value for this property on the primary database when fast-start failover is enabled. If more than one standby database exists, you must specify the FastStartFailoverTarget value explicitly, prior to enabling fast-start failover.

For the target standby database, the broker automatically selects the current primary database as the value for this property when fast-start failover is enabled.

Imported No
Parameter class Not applicable
Role Primary or standby
Standby type Physcial or logical
Corresponds to ... Not applicable
Scope Database
Enterprise Manager name Enterprise Manager displays the value for the current primary database on the Data Guard Overview page, along with whether or not fast-start failover has been enabled.

9.2.10 FastStartFailoverThreshold

Defines the number of seconds the observer attempts to reconnect to the primary database before initiating a fast-start failover to the target standby database. The time interval starts when the observer first detects conditions for triggering a fast-start failover (described in Section 5.5.6). If the observer is unable to regain a connection to the primary database within the specified time, then the observer begins a fast-start failover. See Step 3 in Section 5.5.2 for more information about setting this property.

Category Description
Datatype Integer
Valid Value Integral number of seconds. Must be greater than zero.
Broker default 30 seconds
Imported No
Parameter class Not applicable
Role Target standby database that is about to fail over to the primary role
Standby type Physical or logical
Corresponds to ... Not applicable
Scope Broker configuration. This value will be consumed by the observer after fast-start failover has been enabledFoot 1 
Enterprise Manager name Oracle Enterprise Manager presents this as "Fast-Start Failover Threshold" on the Data Guard Overview page.

Footnote 1 If you specify FastStartFailoverThreshold when fast-start failover is enabled, the observer will recognize the new value the next time it contacts the primary database.

9.2.11 HostName

Specifies the name of the host on which the instance is running. The property can only be updated when broker management of the database is disabled. You should only update the value when the host is renamed, in which case you need to disable broker management of the database, update the HostName property to match with the new host name, and then reenable broker management of the database.

Note:

If the value of the HostName property does not match the actual name of the host, broker management of the database cannot be enabled.
Category Description
Datatype String
Valid values Name of the host on which the instance is running
Broker default Not applicable
Imported? Yes
Parameter class Not applicable
Role Primary and standby
Standby type Physical or logical
Corresponds to ... HOST_NAME column of the V$INSTANCE view
Scope Instance
Enterprise Manager name Not applicable

9.2.12 InitialConnectIdentifier

Specifies the initial connection identifier the broker uses to make the first connection to a database. If using DGMGRL, you supply the value when you enter the CREATE CONFIGURATION or ADD DATABASE command. If using Enterprise Manager, the value is supplied automatically. You should only update the value of this property when the original value has an error.

Category Description
Datatype String
Valid values A connect identifier that can be used to connect to this database
Broker default Not applicable
Imported? No
Parameter class Not applicable
Role Primary and standby
Standby type Physical or logical
Corresponds to ... Not applicable
Scope Database
Enterprise Manager name Not applicable

9.2.13 LocalListenerAddress

Specifies the listener address at which the instance is registered. The property can only be updated when broker management of the database is disabled. You should only update the value when the LOCAL_LISTENER initialization parameter value is being changed, in which case you need to:

  1. Disable broker management of the database

  2. Update the LOCAL_LISTENER initialization parameter value

  3. Update the LocalListenerAddress property in listener ADDRESS format to match with the new LOCAL_LISTENER address

  4. Reenable broker management of the database

In the event that the LOCAL_LISTENER initialization parameter value of instances belonging to more than one database is being changed, it is recommended to:

  1. Disable the configuration

  2. Make the LOCAL_LISTENER initialization parameter value changes at all of the instances

  3. Make the LocalListenerAddress property changes for all of the affected instances

  4. Enable the configuration

Note:

If the value of the LocalListenerAddress property does not match the actual address of the listener at which the instance is registered, broker management of the database cannot be enabled.
Category Description
Datatype String
Valid values Listener address, in ADDRESS format
Broker default Same as the default value for the LOCAL_LISTENER address initialization parameter.
Imported? Yes, from the LOCAL_LISTENER initialization parameter and translated into ADDRESS format if the initialization parameter value is a new service name
Parameter class Dynamic
Role Primary and standby
Standby type Physical or logical
Corresponds to ... LOCAL_LISTENER initialization parameter
Scope Instance
Enterprise Manager name Not applicable

9.2.14 LogArchiveFormat

Specifies the format for filenames of archived redo log files using a database ID (%d), thread (%t), sequence number (%s), and resetlogs ID (%r).

Category Description
Datatype String
Valid values %d_%t_%s_%r
Broker default Empty string
Imported? Yes, from the LOG_ARCHIVE_FORMAT initialization parameter on the primary database
Parameter class Static
Role Primary and standby
Standby type Physical and logical
Corresponds to ... LOG_ARCHIVE_FORMAT initialization parameter
Scope Instance
Enterprise Manager name Not applicable

9.2.15 LogArchiveMaxProcesses

Specifies the initial number of archiver processes (ARCn) the Oracle database invokes. The actual number of archiver processes in use may increase subsequently based on the archiving workload.

Category Description
Datatype Integer
Valid values 1 to 30
Broker default 2
Imported? Yes, from the LOG_ARCHIVE_MAX_PROCESSES initialization parameter
Parameter class Dynamic
Role Primary and standby
Standby type Physical and logical
Corresponds to ... LOG_ARCHIVE_MAX_PROCESSES initialization parameter
Scope Database
Enterprise Manager name Archiver Processes

9.2.16 LogArchiveMinSucceedDest

Controls when online redo log files are available for reuse. For the online redo log files to be available for reuse, archiving must succeed to a minimum number of destinations.

Category Description
Datatype Integer
Valid values 1 to 10
Broker default 1
Imported? Yes, from the LOG_ARCHIVE_MIN_SUCCEED_DEST initialization parameter
Parameter class Dynamic
Role Primary
Standby type Not applicable
Corresponds to ... LOG_ARCHIVE_MIN_SUCCEED_DEST initialization parameter
Scope Database
Enterprise Manager name Not applicable

9.2.17 LogArchiveTrace

Set this property to an integer value to see the progression of the archiving of online redo log files on the primary and the standby databases. The Oracle database writes an audit trail of the archived redo log files received from the primary database into process trace files.

Category Description
Datatype Integer
Valid values A valid value is the sum of any combination of any of the following values:

0: Disable archive redo log tracing

1: Track archiving of online redo log file

2: Track archiving status of each archive redo log destination

4: Track archiving operational phase

8: Track ARCHIVELOG destination activity

16: Track detailed ARCHIVELOG destination activity

32: Track ARCHIVELOG destination parameter modifications

64: Track ARCn process state activity

128: Track FAL (fetch archive log) server related activities

256: Tracks RFS Logical Client

512: Tracks LGWR redo shipping network activity

1024: Tracks RFS physical client

2048: Tracks RFS/ARCn ping heartbeat

4096: Tracks real-time apply activity

8192: Tracks Redo Apply (media recovery or physical standby)

Broker default 255
Imported? Yes, from the LOG_ARCHIVE_TRACE initialization parameter
Parameter class Dynamic
Role Primary and standby
Standby type Physical and logical
Corresponds to... LOG_ARCHIVE_TRACE initialization parameter
Scope Instance
Enterprise Manager name Log Archive Trace

9.2.18 LogFileNameConvert

Converts the filename of an online redo log file on the primary database to the filename of a corresponding online redo log file on the standby database.

Category Description
Datatype String
Valid values Set the value of this property to a list of an even number of string pairs, separated by commas.
  1. The first string is the substring found in the datafile names on the primary database.

  2. The second string is the substring found in the datafile names on the standby database.

For example, ('string1', 'string2', 'string3', 'string4',...)

Where:

  • string1 is the substring of the primary database filename.

  • string2 is the substring of the standby database filename.

  • string3 is the substring of the primary database filename.

  • string4 is the substring of the standby database filename.

Broker default ' '
Imported? Yes, from the LOG_FILE_NAME_CONVERT initialization parameter
Parameter class Static
Role Standby
Standby type Physical
Corresponds to ... LOG_FILE_NAME_CONVERT initialization parameter
Scope Database
Enterprise Manager name Log File Name Convert

9.2.19 LogShipping

Specifies whether or not redo transport services can send archived redo log files to the particular standby database. The broker uses the value of the LogShipping property only when the primary database is in the ONLINE state:

  • If the primary database is in the LOG-TRANSPORT-OFF state, then redo transport services are offline to all standby databases, regardless of whether or not the LogShipping property is set to ON or OFF.

  • If the primary database is in the ONLINE state and the value of the LogShipping property is ON, then redo transport services are enabled to send archived redo log files to the particular standby database. If the LogShipping property is OFF, then redo transport services are disabled to send archived redo log files to the particular standby database.

    Category Description
    Datatype String
    Valid values ON or OFF
    Broker default ON
    Imported? No
    Parameter class Dynamic
    Role StandbyFoot 1 
    Standby type Physical and logical
    Corresponds to ... ENABLE and DEFER values for the LOG_ARCHIVE_DEST_STATE_n initialization parameter of the primary database
    Scope Database
    Enterprise Manager name Log Shipping

    Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.20 LogXptMode

Enables you to set the redo transport service. You set the redo transport services on each standby database to one of the following modes:

  • SYNC

    Configures redo transport services for this standby database using the LGWR, SYNC, and AFFIRM attributes of the LOG_ARCHIVE_DEST_n initialization parameter. Standby redo log files are required. This mode is required for the maximum protection or maximum availability data protection modes. This redo transport service enables the highest grade of data protection to the primary database, but also incurs the highest performance impact.

  • ASYNC

    Configures redo transport services for this standby database using the LGWR, ASYNC, and NOAFFIRM attributes of the LOG_ARCHIVE_DEST_n initialization parameter. Standby redo log files are required. This mode enables a moderate grade of data protection to the primary database, and incurs a lower performance impact than SYNC.

  • ARCH

    Configures redo transport services for this standby database using the ARCH attribute of the LOG_ARCHIVE_DEST_n initialization parameter. Standby redo log files are not required. This mode enables the lowest grade of data protection to the primary database, and incurs the lowest performance impact. This is the default setting.

    Category Description
    Datatype String
    Valid values SYNC or ASYNC or ARCH
    Broker default
    • ASYNC for standby databases with standby redo log files
    • ARCH for standby databases without standby redo log files

    Imported? Yes, from the ARCHIVER, TRANSMIT_MODE, and AFFIRM columns of V$ARCHIVE_DEST view of the primary database
    Parameter class Dynamic
    Role StandbyFoot 1 
    Standby type Physical or logical
    Corresponds to ...
    • ARCH, LGWR, SYNC, ASYNC, AFFIRM, and NOAFFIRM attributes for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
    • ARCHIVER, TRANSMIT_MODE, and AFFIRM columns of V$ARCHIVE_DEST view of the primary database

    Scope Database
    Enterprise Manager name Redo Transport Service

    Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

    See Also:

    Chapter 4 for more information about setting data protection modes for redo transport services

9.2.21 LsbyASkipCfgPr

Provides a way to add a skip specification to SQL Apply to control the apply service to skip (ignore) SQL statements that you do not want to apply to the logical standby database. The SKIP operation:

  • Sets the criteria for identifying the SQL statements that will not be applied to the standby database

  • Specifies any additional processing that will be done, if necessary

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid values A valid set of arguments to the DBMS_LOGSTDBY.SKIP procedure
Broker default Empty string
Imported? No
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.SKIP procedure
Scope Database
Enterprise Manager name Add Skip Table Entries

9.2.22 LsbyASkipErrorCfgPr

Adds a skip error specification to SQL Apply. It provides criteria to determine if an error should cause SQL Apply to stop. All errors to be skipped are stored in system tables that describe how exceptions should be handled.

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid values A valid set of arguments to the DBMS_LOGSTDBY.SKIP_ERROR procedure. The string must contain comma separators between the arguments.
Broker default Empty string
Imported? No
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.SKIP_ERROR procedure
Scope Database
Enterprise Manager name Add Skip Table Entries

9.2.23 LsbyASkipTxnCfgPr

Skips over a transaction that caused SQL Apply to stop applying transactions to the logical standby database. This property enables you to specify the transaction ID (XIDSQN NUMBER) of the problematic transaction that you want SQL Apply to ignore. Before you restart SQL Apply, you should issue a SQL transaction that will correctly update the logical standby database in place of the skipped transaction. Applying a compensating transaction will help keep the logical standby database transactionally consistent with the primary database.

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid values A valid set of arguments to the DBMS_LOGSTDBY.SKIP_TRANSACTION procedure. Use comma separators between the arguments.
Broker default Empty string
Imported? No
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.SKIP_TRANSACTION procedure
Scope Database
Enterprise Manager name Skip Edit Properties

Note:

Enterprise Manager indirectly supports skipping a transaction using the Skip Edit Properties page.

9.2.24 LsbyDSkipCfgPr

Deletes an existing skip specification from SQL Apply. It reverses or removes the actions of the LsbyASkipCfgPr property by finding the record, matching all the parameters, and removing the record from the system table. The match must be exact, and multiple skip actions can be removed only by a matching number of unskip actions. You cannot remove multiple skip actions by using wildcard characters as a value to this property.

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid Values A valid set of arguments to the DBMS_LOGSTDBY.UNSKIP procedure
Broker Default Empty string
Imported? No
Parameter Class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.UNSKIP procedure
Scope Database
Enterprise Manager name Remove Skip Table Entries

9.2.25 LsbyDSkipErrorCfgPr

Deletes an existing skip error specification from SQL Apply. It reverses or removes the actions of the LsbyASkipErrorCfgPr property by finding the record, matching all of the parameters and removing the record from the system table. The match must be exact, and multiple skip actions can be removed only by a matching number of unskip actions. You cannot remove multiple skip actions by using wildcard characters as a value to this property.

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid values A valid set of arguments to the DBMS_LOGSTDBY.UNSKIP_ERROR procedure. The string must contain comma separators between the arguments.
Broker default Empty string
Imported? No
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.UNSKIP_ERROR procedure
Scope Database
Enterprise Manager name Remove Skip Table Entries

9.2.26 LsbyDSkipTxnCfgPr

Reverses or removes the actions of the LsbyASkipTxnCfgPr property. The transaction IDs must match exactly, and multiple skip transaction actions can be removed only by a matching number of unskip transaction actions. You cannot remove multiple skip transaction actions by using wildcard characters as a value to this property.

Specifying a value for this property has no effect and will be ignored if management of the standby database is disabled.

Category Description
Datatype String
Valid values A valid set of arguments to the DBMS_LOGSTDBY.UNSKIP_TRANSACTION procedure
Broker default Empty string
Imported? No
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.UNSKIP_TRANSACTION procedure
Scope Database
Enterprise Manager name Not applicable

9.2.27 LsbyMaxEventsRecorded

Specifies the number of events that will be stored in the DBA_LOGSTDBY_EVENTS table, which stores logical standby event information.

Category Description
Datatype Integer
Valid values >=0
Broker default 0
Imported? Yes, from the MAX_EVENTS_RECORDED row of SYSTEM.LOGSTDBY$PARAMETERS
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('MAX_EVENTS_RECORDED') and the DBMS_LOGSTDBY.APPLY_UNSET('MAX_EVENTS_RECORDED') procedures
Scope Database
Enterprise Manager name Max Events Recorded

9.2.28 LsbyMaxSga

Specifies the number of megabytes for the allocation of SQL Apply cache in the system global area (SGA). If the value is 0, SQL Apply uses one quarter of the value set for the SHARED_POOL_SIZE initialization parameter.

Category Description
Datatype Integer
Valid values >=0
Broker default 0
Imported? Yes, from the MAX_SGA row of SYSTEM.LOGSTDBY$PARAMETERS
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('MAX_SGA') and the DBMS_LOGSTDBY.APPLY_UNSET('MAX_SGA') procedures
Scope Instance
Enterprise Manager name Max SGA (MB)

9.2.29 LsbyMaxServers

Specifies the number of parallel query servers specifically reserved for SQL Apply. If the value is 0, SQL Apply uses all available parallel query servers to read the log files and apply changes.

Category Description
Datatype Integer
Valid values >=0
Broker default 0
Imported? Yes, from the MAX_SERVERS row of SYSTEM.LOGSTDBY$PARAMETERS
Parameter class Not applicable
Role Standby
Standby type Logical
Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('MAX_SERVERS') and the DBMS_LOGSTDBY.APPLY_UNSET('MAX_SERVERS') procedures
Scope Instance
Enterprise Manager name Max Servers

9.2.30 LsbyRecordAppliedDdl

Controls whether or not DDL statements that were applied to the logical standby database are recorded in the DBA_LOGSTDBY_EVENTS table. Specify one of the following values:

  • TRUE: DDL statements applied to the logical standby database are recorded in the DBA_LOGSTDBY_EVENTS table. This is the default setting.

  • FALSE: Applied DDL statements are not recorded.

    Category Description
    Datatype String
    Valid values TRUE or FALSE
    Broker default TRUE
    Imported? Yes, from the RECORD_APPLIED_DDL row of SYSTEM.LOGSTDBY$PARAMETERS
    Parameter class Not applicable
    Role Standby
    Standby type Logical
    Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('RECORD_APPLIED_DDL') and the DBMS_LOGSTDBY.APPLY_UNSET('RECORD_APPLIED_DDL') procedures
    Scope Database
    Enterprise Manager name Record Applied DDL

9.2.31 LsbyRecordSkipDdl

Controls whether or not skipped DDL statements are recorded in the DBA_LOGSTDBY_EVENTS table. Specify one of the following values:

  • TRUE: Skipped DDL statements are recorded in the DBA_LOGSTDBY_EVENTS table. This is the default setting.

  • FALSE: Skipped DDL statements are not recorded in the DBA_LOGSTDBY_EVENTS table.

    Category Description
    Datatype String
    Valid values TRUE or FALSE
    Broker default TRUE
    Imported? Yes, from the RECORD_SKIP_DDL row of SYSTEM.LOGSTDBY$PARAMETERS
    Parameter class Not applicable
    Role Standby
    Standby type Logical
    Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('RECORD_SKIP_DDL') and the DBMS_LOGSTDBY.APPLY_UNSET('RECORD_SKIP_DDL') procedures
    Scope Database
    Enterprise Manager name Record Skip DDL

9.2.32 LsbyRecordSkipErrors

Controls whether or not skipped errors (as described by the DBMS_LOGSTDBY.SKIP_ERROR procedure) are recorded in the DBA_LOGSTDBY_EVENTS table. Specify one of the following values:

  • TRUE: Skipped errors are recorded in the DBA_LOGSTDBY_EVENTS table.

  • FALSE: Skipped errors are not recorded in the DBA_LOGSTDBY_EVENTS table.

    Category Description
    Datatype String
    Valid values TRUE or FALSE
    Broker default TRUE
    Imported? Yes, from the RECORD_SKIP_ERRORS row of SYSTEM.LOGSTDBY$PARAMETERS
    Parameter class Not applicable
    Role Standby
    Standby type Logical
    Corresponds to DBMS_LOGSTDBY.APPLY_SET('RECORD_SKIP_ERRORS') and the DBMS_LOGSTDBY.APPLY_UNSET('RECORD_SKIP_ERRORS') procedures
    Scope Database
    Enterprise Manager name Record Skip Errors

9.2.33 LsbyTxnConsistency

Controls the level of transaction consistency maintained between the primary and standby databases. Specify one of the following values:

  • FULL: Transactions are applied to the logical standby database in the exact order in which they were committed on the primary database. This option may affect performance.

  • READ_ONLY: Transactions are committed out of order (which provides better performance). SQL SELECT statements return read-consistent results. This is particularly beneficial when the logical standby database is being used to generate reports.

    Note:

    DML statements involving standby tables are not allowed in this mode.
  • NONE: Transactions are committed out of order and no attempt is made to provide read-consistent results. This results in the best performance of the three modes. If applications reading the logical standby database make no assumptions about transaction order, this option works well.

    Category Description
    Datatype String
    Valid values FULL or READ_ONLY or NONE
    Broker default FULL
    Imported? Yes, from the PRESERVE_COMMIT_ORDER row of SYSTEM.LOGSTDBY$PARAMETERS
    Parameter class Not applicable
    Role Standby
    Standby type Logical
    Corresponds to ... DBMS_LOGSTDBY.APPLY_SET('PRESERVE_COMMIT_ORDER') and the DBMS_LOGSTDBY.APPLY_UNSET('PRESERVE_COMMIT_ORDER') procedures
    Scope Database
    Enterprise Manager name Transaction Consistency Level

9.2.34 MaxConnections

Specifies how the archiver (ARCn) processes on the primary database coordinate when sending redo data to standby databases. If the MaxConnections property is set to a nonzero value, redo transport services use multiple network connections to transmit redo data using the archiver process (ARCn).

Category Description
Datatype Integer
Valid values >=0
Broker default 0
Imported? Yes, from the MAX_CONNECTIONS column of the V$ARCHIVE_DEST view for the primary database.
Parameter class Dynamic
Role Standby
Standby type Physical and logical
Corresponds to ...
  • LOG_ARCHIVE_MAX_PROCESSES and PARALLEL_MAX_SERVERS initialization parametersFoot 1 
  • MAX_CONNECTIONS attribute for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database

  • MAX_CONNECTIONS column of the V$ARCHIVE_DEST view of the primary database


Footnote 1 The LOG_ARCHIVE_MAX_PROCESSES and PARALLEL_MAX_SERVERS initialization parameters affect the actual number of ARCn processes used by an instance. See Oracle Data Guard Concepts and Administration for more information.

9.2.35 MaxFailure

Specifies the maximum number of contiguous archiving failures before the redo transport services stop trying to transport archived redo log files to the standby database. A value of zero indicates that an unlimited number of failures are allowed.

Category Description
Datatype Integer
Valid values >=0
Broker default 0
Imported? Yes, from the MAX_FAILURE column of V$ARCHIVE_DEST view of the primary database
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical and logical
Corresponds to ...
  • MAX_FAILURE attribute for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
  • MAX_FAILURE column of the V$ARCHIVE_DEST view of the primary database

Scope Database
Enterprise Manager name Not applicable

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.36 NetTimeout

Specifies the number of seconds the LGWR waits for Oracle Net Services to respond to a LGWR request. It is used to bypass the long connection timeout in TCP. This property is only used when the LogXptMode property of the same database is set to SYNC or ASYNC.

Category Description
Datatype Integer
Valid values 0, 15 to 1200
Broker default 180
Imported? Yes, from the NET_TIMEOUT column of V$ARCHIVE_DEST view of the primary database
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical and logical
Corresponds to ...
  • NET_TIMEOUT attribute of the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
  • NET_TIMEOUT column of V$ARCHIVE_DEST view of the primary database

Scope Database
Enterprise Manager name Not applicable

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.37 PreferredApplyInstance

Indicates that a particular instance is the preferred choice for serving log apply services. It is only used when the database is a standby RAC database. The value could be an empty string (default) which means the broker chooses the apply instance.

Category Description
Datatype String
Valid Values The instance name (SID) or empty string
Broker Default Empty string
Imported? No
Parameter Class Not applicable
Role Standby
Standby Type Physical and logical
Corresponds to Not applicable
Scope Database
Enterprise Manager name Apply Instance

See Also:

Section 4.5.7 for more information

9.2.38 ReopenSecs

Specifies the minimum number of seconds before the archiver process (ARCn, foreground, or log writer process) should try again to access a previously failed destination.

Category Description
Datatype Integer
Valid values >=0 seconds
Broker default 300
Imported? Yes, from the REOPEN_SECS column of V$ARCHIVE_DEST view of the primary database
Parameter class Dynamic
Role StandbyFoot 1 
Standby type Physical and logical
Corresponds to ...
  • REOPEN attribute for the LOG_ARCHIVE_DEST_n initialization parameter of the primary database
  • REOPEN_SECS column of the V$ARCHIVE_DEST view of the primary database

Scope Database
Enterprise Manager name Not applicable

Footnote 1 Although this property is set for the standby database, it is indirectly related to the redo transport services for the primary database. The broker propagates the setting you specify on the standby database to the corresponding attributes of the LOG_ARCHIVE_DEST_n value of the primary database.

9.2.39 SidName

Specifies the SID of the instance. The property can only be updated when broker management of the database is disabled. You should only update the value when the SID is changed, in which case you need to disable broker management of the database, update the SidName property to match with the new SID, and reenable broker management of the database.

Note:

If the value of the SidName property does not match the actual value of the SID, broker management of the database cannot be enabled.
Category Description
Datatype String
Valid values SID of the instance
Broker default Not applicable
Imported? Yes
Parameter class Not applicable
Role Primary and standby
Standby type Physical or logical
Corresponds to ... INSTANCE_NAME column of the V$INSTANCE view
Scope Instance
Enterprise Manager name Not applicable

9.2.40 StandbyArchiveLocation

Specifies the location of archived redo log files arriving from a primary database. Oracle recommends that you always explicitly set the value (if flash recovery area is not in use).

Category Description
Datatype String
Valid values Nonempty file specification of the location of archived redo log files on the standby database
Broker default dgsby_db_unique_name
Imported? Yes, from the DESTINATION column of the V$ARCHIVE_DEST fixed view of the standby database where the destination is a local destination and where the VALID_FOR attribute is compatible with the string (STANDBY_ROLE, STANDBY_LOGFILE); if no such destination exists, import is from the STANDBY_ARCHIVE_DEST initialization parameter
Parameter class Dynamic
Role Standby
Standby type Physical or logical
Corresponds to ...
  • LOCATION attribute of the LOG_ARCHIVE_DEST_n initialization parameter of the standby database with VALID_FOR compatible with (STANDBY_ROLE, STANDBY_LOGFILE)
  • DESTINATION column of the V$ARCHIVE_DEST view of the standby database

Scope Instance
Enterprise Manager name Standby Archive Location

Note:

On a logical standby database, Oracle recommends the LOCATION attribute of the LOG_ARCHIVE_DEST_n initialization parameter for the local destination be different from the value of StandbyArchiveLocation property.

9.2.41 StandbyFileManagement

Affects how the add datafile operation on the primary database is applied on the standby database. If this property is set to AUTO, in conjunction with valid settings in the DbFileNameConvert property, a corresponding new datafile is automatically created on the standby database. The location of this new standby datafile is determined by the value of the DbFileNameConvert property.

If this property is set to MANUAL, you have to create the correct new datafile on the standby database manually.

Category Description
Datatype String
Valid values AUTO or MANUAL
Broker default AUTO
Imported? Yes, from the STANDBY_FILE_MANAGEMENT initialization parameter
Parameter class Dynamic
Role Standby
Standby type Physical or logical
Corresponds to ... STANDBY_FILE_MANAGEMENT initialization parameter
Scope Database
Enterprise Manager name Not applicable