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Initialize SLRU stats entries to zero.

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Previously since SLRUStats was not initialized, SLRU stats counters
could begin with non-zero value. Which could lead to incorrect results
in pg_stat_slru view.

Author: Fujii Masao
Reviewed-by: Tomas Vondra
Discussion: https://postgr.es/m/976bbb73-a112-de3c-c488-b34b64609793@oss.nttdata.com
This commit is contained in:
Fujii Masao
2020-05-13 22:19:25 +09:00
parent ac3a4866c0
commit f3d23d83ef
1 changed files with 3 additions and 0 deletions
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3
src/backend/postmaster/pgstat.c
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@ -2900,6 +2900,9 @@ pgstat_initialize(void)
MyBEEntry = &BackendStatusArray[MaxBackends + MyAuxProcType]; MyBEEntry = &BackendStatusArray[MaxBackends + MyAuxProcType];
} }
/* Initialize SLRU statistics to zero */
memset(&SLRUStats, 0, sizeof(SLRUStats));
/* Set up a process-exit hook to clean up */ /* Set up a process-exit hook to clean up */
on_shmem_exit(pgstat_beshutdown_hook, 0); on_shmem_exit(pgstat_beshutdown_hook, 0);
} }