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- onconfig.std
value
- 32
- units
- Kilobytes
- range of values
- (2 * page size) through LOGSIZE
- takes effect
- When shared memory is initialized
- refer to
- Logical-log buffer in the shared-memory chapter of the IBM Informix: Administrator's Guide
LOGBUFF specifies
the size in kilobytes of each of the three logical-log buffers
in shared memory. Triple buffering permits user threads to write
to the active buffer while one of the other buffers is being flushed
to disk. If flushing is not complete by the time the active buffer
fills, the user thread begins writing to the third buffer.
It is recommended that you set LOGBUFF to
16 or 32 kilobytes, or perhaps 64 kilobytes for heavy workloads.
Important:
The database server uses the LOGBUFF parameter
to set the size of internal buffers that are used during recovery.
If you set LOGBUFF too high, the database
server can run out of memory and shut down during recovery.
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