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Flush any remaining statistics counts out to the collector at process

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exit.  Without this, operations triggered during backend exit (such as
temp table deletions) won't be counted ... which given heavy usage of
temp tables can lead to pg_autovacuum falling way behind on the need
to vacuum pg_class and pg_attribute.  Per reports from Steve Crawford
and others.
This commit is contained in:
Tom Lane 2005-03-31 23:20:49 +00:00
parent 47888fe842
commit 9336d636e2
1 changed files with 21 additions and 1 deletions
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22
src/backend/postmaster/pgstat.c
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@ -13,7 +13,7 @@
*
* Copyright (c) 2001-2005, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.88 2005/03/25 00:34:21 tgl Exp $
* $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.89 2005/03/31 23:20:49 tgl Exp $
* ----------
*/
#include "postgres.h"
@ -160,6 +160,7 @@ NON_EXEC_STATIC void PgstatCollectorMain(int argc, char *argv[]);
static void pgstat_recvbuffer(void);
static void pgstat_exit(SIGNAL_ARGS);
static void pgstat_die(SIGNAL_ARGS);
static void pgstat_beshutdown_hook(int code, Datum arg);
static int pgstat_add_backend(PgStat_MsgHdr *msg);
static void pgstat_sub_backend(int procpid);
@ -670,6 +671,25 @@ pgstat_bestart(void)
pgstat_setheader(&msg.m_hdr, PGSTAT_MTYPE_BESTART);
pgstat_send(&msg, sizeof(msg));
/*
* Set up a process-exit hook to ensure we flush the last batch of
* statistics to the collector.
*/
on_proc_exit(pgstat_beshutdown_hook, 0);
}
/*
* Flush any remaining statistics counts out to the collector at process
* exit. Without this, operations triggered during backend exit (such as
* temp table deletions) won't be counted. This is an on_proc_exit hook,
* not on_shmem_exit, so that everything interesting must have happened
* already.
*/
static void
pgstat_beshutdown_hook(int code, Datum arg)
{
pgstat_report_tabstat();
}