Re: 8.3devel slower than 8.2 under read-only load

From: Gregory Stark <stark(at)enterprisedb(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Guillaume Smet" <guillaume(dot)smet(at)gmail(dot)com>, "PostgreSQL-development" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: 8.3devel slower than 8.2 under read-only load
Date: 2007-11-22 09:50:48
Message-ID: 87zlx6zk07.fsf@oxford.xeocode.com
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"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

> The weird thing is that after a couple of hours of poking at it with
> oprofile and other sharp objects, I have no idea *why* it's slower.
> oprofile shows just about the same relative percentages for all the
> hot-spot functions in the backend.

Out of curiosity have you recompiled 8.2.5 recently? That is, are they
compiled with the same version of gcc?

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training!

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