From: Tom Lane <tgl@sss.pgh.pa.us>
To: eVl <evl.evl@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: optimization downgrade perfomance?
Date: Fri, 23 Sep 2005 09:40:08 -0400
Message-ID: <3192.1127482808@sss.pgh.pa.us> (raw)
In-Reply-To: <133614678.20050923012716@gmail.com>
References: <133614678.20050923012716@gmail.com>
eVl <evl.evl@gmail.com> writes:
> When executing this SELECT (see SELECT.A above) it executes in about 700 ms, but when I want wipe out all info about local traffic, with query like this:
> SELECT * FROM ( SELECT.A ) a WHERE type = 'global';
> It executes about 10000 ms - more then 10 TIMES SLOWER!
> Why this could be?
You tell us --- let's see EXPLAIN ANALYZE results for both cases.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, evl.evl@gmail.com
Subject: Re: optimization downgrade perfomance?
In-Reply-To: <3192.1127482808@sss.pgh.pa.us>
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