On Thu, Apr 10, 2025 at 04:39:45PM -0500, Sami Imseih wrote: > Also, The documentation for pg_stat_wal already makes this point clear > in [0] that "wal_sync is only > incremented when the wal_sync_method is either fdatasync, fsync or > fsync_writethrough". > > Perhaps, the same clarification will be beneficial for the > pg_stat_io.fsyncs* fields?
wal_sync and wal_sync_time (and the write parts) have been moved from pg_stat_wal to pg_stat_io under the 'wal' object, and these details with wal_sync_method are documented here: https://www.postgresql.org/docs/devel/wal-configuration.html The docs of pg_stat_io include a paragraph that link to the WAL configuration: https://www.postgresql.org/docs/devel/monitoring-stats.html#MONITORING-PG-STAT-IO-VIEW `For the object wal, fsyncs and fsync_time track the fsync.. blah.` The current format is intentional to reduce the amount of duplication in the docs regarding this level of details to one place: the section that describes in details the internals of the WAL I/O activity. -- Michael
signature.asc
Description: PGP signature
