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Re: performance regression with 9.2 - Mailing list pgsql-performance

From Dave Cramer
Subject Re: performance regression with 9.2
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Msg-id CADK3HHJrqgJ+U8GNCokHZPXcnMAq76zrwnVzb8omRNy=h2v-ww@mail.gmail.com
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In response to Re: performance regression with 9.2  (Tom Lane <tgl@sss.pgh.pa.us>)
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Tom,

Will try to get one ASAP.

Dave

Dave Cramer

dave.cramer(at)credativ(dot)ca
http://www.credativ.ca



On Mon, Nov 12, 2012 at 3:43 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
Dave Cramer <pg@fastcrypt.com> writes:
> This query is a couple orders of magnitude slower the first result is
> 9.2.1, the second 9.1

Hm, the planner's evidently doing the wrong thing inside the recursive
union, but not obvious why.  Can you extract a self-contained test case?

                        regards, tom lane

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