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Refactor some code related to backend statistics

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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
This commit is contained in:
Michael Paquier
2025-01-10 09:00:48 +09:00
parent 39e3bcae44
commit 2c14037bb5
8 changed files with 76 additions and 35 deletions
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src/tools/pgindent/typedefs.list
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@@ -2140,7 +2140,7 @@ PgStatShared_Subscription
PgStatShared_Wal
PgStat_ArchiverStats
PgStat_Backend
PgStat_BackendPendingIO
PgStat_BackendPending
PgStat_BackendSubEntry
PgStat_BgWriterStats
PgStat_BktypeIO