Outline Size Used in Memory

The attribute association area included in disk space calculations is not a sizing factor for memory. Calculate only the main area of the outline.

For memory size requirements, outline size is calculated using the following factors:

  To calculate the outline memory requirement, multiply the number of members by a name-length factor of 300 bytes-400 bytes and write the result in the cell labeled MA in Table 250, Worksheet: Estimating Memory Requirements for a Database.

If the database includes few aliases or very short aliases and short member names, use a smaller number in the 300 byte-400 byte range. If you know that the names or aliases are very long, use a larger number within this range.

Because the name-length factor is an estimated average, the following formula provides only a rough estimate of the main area of the outline:

memory size of outline 
= number of members 
* name-length factor

Note:

See Limits, for the maximum sizes for member names and aliases.

Example

Assuming that the outline has 26,000 members and a median name-length, use the following calculation to estimate the outline size used in memory:

26,000 members 
* 350 bytes per member 
= 9,100,000 bytes