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Database Administration
Reference : Database Startup Parameters : Alphabetical listing of database startup parameters : After-image Buffers (-aibufs)
After-image Buffers (-aibufs)
Operating system and syntax
UNIX / Windows
-aibufs n
Use with
Maximum value
Minimum value
Single-user default
Multi-user default
The number of after-image buffers.
Use After-image buffer (-aibufs) to specify the number of after-image buffers. This parameter is useful only when running the after-image writer (AIW) because the AIW writes the filled after-image buffers to disk, making the buffers available to other client and server processes. Try setting -aibufs to a value of 1.5 times the value of the Before-image Buffers (-bibufs) parameter, or a minimum of 5.
Without the AIW writing the buffers, any gain from increasing the number of buffers is negligible.
Note: Validations using -aibufs can be run online as part of routine health checks. For more information, see PROUTIL Utility.