Setting the Size of the Outline Change Log

The default size for the outline change log (dbname.olg) is 64,000 bytes. To change the maximum size, use the OUTLINECHANGELOGFILESIZE configuration setting in the essbase.cfg file. See the Oracle Essbase Technical Reference.

When the outline change log reaches the maximum size, Essbase copies the contents of the .olg file to a new file, changing the extension to .olb. For example, when basic.olg reaches the maximum size, the contents are copied to basic.olb.

After the copy operation, the .olg file is cleared and Essbase writes new log entries to it.

Each time the .olg files reaches its maximum file size, Essbase overwrites the existing .olb file with the current contents of the .olg. Therefore, be sure to retrieve information from the .olb file before it is overwritten.

The default, minimum, and maximum file sizes for the .olg file are also automatically applied to the .olb file. For example, if you change the maximum size of the outline change log to 2 MB, the .olb file is automatically set to the same maximum size.