From e927f55ffffb43b29e7a8c459825950b2b280219 Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Thu, 27 Oct 2016 14:27:40 -0400 Subject: [PATCH] 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. --- src/backend/postmaster/postmaster.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c index 09f50bf4942..f3e723230c9 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -1754,7 +1754,8 @@ ServerLoop(void) PgArchPID = pgarch_start(); /* 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 need to signal the autovacuum launcher, do so now */ @@ -2902,7 +2903,7 @@ 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; }