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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Vladimir Yavoskiy <vovka@krevedko.su>
cc: pgsql-performance@postgresql.org
Subject: Re: query partitioned table is very slow
In-reply-to: <5621740E.3010002@krevedko.su>
References: <5621740E.3010002@krevedko.su>
Comments: In-reply-to Vladimir Yavoskiy <vovka@krevedko.su>
 message dated "Sat, 17 Oct 2015 01:02:54 +0300"
Date: Fri, 16 Oct 2015 19:02:08 -0400
Message-ID: <4321.1445036528@sss.pgh.pa.us>
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Vladimir Yavoskiy <vovka@krevedko.su> writes:
> I have about 900 partitioned tables with 67 millons rows.
> And I found that my query takes too much time!

That's about 100X partitions too many for that amount of rows.
Partitions are a good thing in small doses, otherwise planning
time will kill you.

			regards, tom lane


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