PostgreSQL: Documentation: 18: 28.5. WAL Configuration
28.5. WAL Configuration # There are several WAL-related configuration parameters that affect database performance. This section explains their use. Consult Chapter 19 …
There are several WAL-related configuration parameters that affect database performance. This section explains their use. Consult Chapter 19 for general information about setting server configuration parameters. Checkpoints are points in the sequence of transactions at which it is guaranteed that the heap and index data files have been updated with all information written before that checkpoint. At checkpoint time, all dirty data pages are flushed to disk and a special checkpoint record is written to the WAL file. (The change records were previously flushed to the WAL files.) In the event…
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