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If the stats collector dies during Hot Standby, restart it. 

This bug exists as far back as 9.0, when Hot Standby was introduced,
so back-patch to all supported branches.

Report and patch by Takayuki Tsunakawa, reviewed by Michael Paquier
and Kuntal Ghosh.
This commit is contained in:
Robert Haas 2016-10-27 14:27:40 -04:00
parent f267c1c244
commit 4f714b2fd2
1 changed files with 3 additions and 2 deletions
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5
src/backend/postmaster/postmaster.c
View File

@ -1753,7 +1753,8 @@ ServerLoop(void)
}
/* If we have lost the stats collector, try to start a new one */
if (PgStatPID == 0 && pmState == PM_RUN)
if (PgStatPID == 0 &&
(pmState == PM_RUN || pmState == PM_HOT_STANDBY))
PgStatPID = pgstat_start();
/* If we have lost the archiver, try to start a new one. */
@ -2963,7 +2964,7 @@ reaper(SIGNAL_ARGS)
if (!EXIT_STATUS_0(exitstatus))
LogChildExit(LOG, _("statistics collector process"),
pid, exitstatus);
if (pmState == PM_RUN)
if (pmState == PM_RUN || pmState == PM_HOT_STANDBY)
PgStatPID = pgstat_start();
continue;
}