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Re: unusual performance for vac following 8.2 upgrade

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Kim <kim(at)myemma(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: unusual performance for vac following 8.2 upgrade
Date: 2007-01-11 18:20:52
Message-ID: 27939.1168539652@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-performance
Kim <kim(at)myemma(dot)com> writes:
> size of pg_class: 535,226
> number of relations: 108,694

Oh, I shoulda read all the way to the bottom of your email :-(.  What
version of PG were you running before?  I would think that pretty much
any version of pgstat_vacuum_tabstats would have had a performance issue
with pg_class that large.  Also, could we see

	select relkind, count(*) from pg_class group by relkind;

			regards, tom lane

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