From: Palle Girgensohn <girgen@pingpong.net>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-performance@postgresql.org
Subject: Re: select max(field) from table much faster with a group by clause?
Date: Thu, 01 Nov 2007 16:25:08 +0100
Message-ID: <16563C7D831BD7B32DFBDDEC@rambutan.pingpong.net> (raw)
In-Reply-To: <5504.1193929617@sss.pgh.pa.us>
References: <D26563C7B9CCEB0A338FF08E@rambutan.pingpong.net>
<4305.1193924619@sss.pgh.pa.us>
<DFCABF1E9EE0F7A9D44CA50A@rambutan.pingpong.net>
<5504.1193929617@sss.pgh.pa.us>
--On torsdag, november 01, 2007 11.06.57 -0400 Tom Lane <tgl@sss.pgh.pa.us>
wrote:
> Palle Girgensohn <girgen@pingpong.net> writes:
>> Unfortunately, altering statistics doesn't help. I see no difference
>> when altering the value from 10 (default) to 100, 1000 or 100000. :-(
>
> Um, you did re-ANALYZE the table after changing the setting?
alter table login alter userid SET statistics 1000;
vacuum analyze login;
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To: pgsql-performance@postgresql.org
Cc: girgen@pingpong.net, tgl@sss.pgh.pa.us
Subject: Re: select max(field) from table much faster with a group by clause?
In-Reply-To: <16563C7D831BD7B32DFBDDEC@rambutan.pingpong.net>
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