Determines the maximum number of outstanding WAL log writes to allow before tasks requiring synchronous writes are delayed to achieve better buffering.
Field Group
File System
Valid Range
1 through 40
Default
5
Changes Take Effect
After the next database restart.
Usage Notes
If the number of outstanding WAL log writes is less than or equal to the MaxSyncWALWrites value, requests for synchronous operations will append the record to the current buffer, force a new buffer, and issue a synchronous write on the current buffer.
If the number of outstanding writes is greater than the MaxSyncWALWrites value, the record will be appended, but the write will be delayed until one of the outstanding write requests is completed.