From: | Greg Smith <greg(at)2ndquadrant(dot)com> |
---|---|
To: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: SELECT constant; takes 15x longer on 9.0? |
Date: | 2010-04-06 18:28:38 |
Message-ID: | 4BBB7D56.2050005@2ndquadrant.com |
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Lists: | pgsql-hackers |
David E. Wheeler wrote:
> By stupidly having configured with --enable-cassert --enable-debug without realizing it. I've just rebuilt without them and run the tests again using the default postgresql.conf and I'm back down to 57s and 46s over two runs.
>
Every performance test I run, regardless of where the binaries come from
or how I thought they were built, starts like this:
postgres=# show debug_assertions;
debug_assertions
------------------
off
(1 row)
It's a really good habit to get into, or even enforce in your testing
script if practical.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.us
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