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Re: last_autovacuum & last_autoanalyze showing NULL

From: "Gnanakumar" <gnanam(at)zoniac(dot)com>
To: "'Tom Lane'" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-admin(at)postgresql(dot)org>, <bnichols(at)ca(dot)afilias(dot)info>
Subject: Re: last_autovacuum & last_autoanalyze showing NULL
Date: 2010-08-26 10:31:41
Message-ID: 003301cb4509$e163afe0$a42b0fa0$@com (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
> I don't believe pg_postmaster_start_time() is reset by a
> backend-crash-and-restart sequence ... but the stats collector data will
> be.  You might want to look into the postmaster log for evidence of
> such a crash.

I'm sure that the backend has neither restarted nor crashed at that moment.
Anyway, I've also confirmed this in the server log, I don't find any
evidence or trace of this happened.

Is there any other possible reasons that could make autovacuum daemon to
update it to NULL value?

NOTE: "log_min_messages" is set to NOTICE.

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