Horton

Refactor some code related to backend statistics

Michael Paquier <michael@paquier.xyz>

View on postgr.es
Commit: 2c14037bb57c091b9f0bcbd36fa62138601beb55
Author: Michael Paquier <michael@paquier.xyz>
Date: 2025-01-10T00:00:48Z
Releases: 18.0 
Refactor some code related to backend statistics

This commit changes the way pending backend statistics are tracked by
moving them into a new structure called PgStat_BackendPending, removing
PgStat_BackendPendingIO.  PgStat_BackendPending currently only includes
PgStat_PendingIO for the pending I/O stats.

pgstat_flush_backend() is extended with a "flags" argument to control
which parts of the stats of a backend should be flushed.

With this refactoring, it becomes easier to plug into backend statistics
more data.  A patch to add information related to WAL in this stats kind
is under discussion.

Author: Bertrand Drouvot
Discussion: https://postgr.es/m/Z3zqc4o09dM/Ezyz@ip-10-97-1-34.eu-west-3.compute.internal

Files

PathChange+/−
src/backend/utils/activity/pgstat_backend.c modified +49 −20
src/backend/utils/activity/pgstat.c modified +1 −1
src/backend/utils/activity/pgstat_io.c modified +4 −4
src/backend/utils/activity/pgstat_relation.c modified +2 −2
src/backend/utils/adt/pgstatfuncs.c modified +1 −1
src/include/pgstat.h modified +13 −4
src/include/utils/pgstat_internal.h modified +5 −2
src/tools/pgindent/typedefs.list modified +1 −1

Discussion