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From: David G Johnston <david.g.johnston@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: weird execution plan
Date: Thu, 11 Sep 2014 19:45:05 -0700 (PDT)
Message-ID: <1410489905373-5818733.post@n5.nabble.com> (raw)
In-Reply-To: <D83E55F5F4D99B4A9B4C4E259E6227CD01EBF04C@AUX1EXC02.apac.experian.local>
References: <D83E55F5F4D99B4A9B4C4E259E6227CD01EBF04C@AUX1EXC02.apac.experian.local>
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Huang, Suya wrote
> Can someone figure out why the first query runs so slow  comparing to the
> second one? They generate the same result...

Try: EXPLAIN (ANALYZE, BUFFERS)

I believe you are only seeing caching effects.

David J.



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