From 4a43a6244d93dd0e16a898ff18d8641512b6006c 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 c834d2e3044..923fa3f2fd2 100644 --- a/src/backend/postmaster/postmaster.c +++ b/src/backend/postmaster/postmaster.c @@ -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; }