From: Jean-David Beyer <jeandavid8@verizon.net>
To: pgsql performance <pgsql-performance@postgresql.org>
Subject: Re: Curious about dead rows.
Date: Wed, 14 Nov 2007 09:58:33 -0500
Message-ID: <473B0D19.4000509@verizon.net> (raw)
In-Reply-To: <20071114125808.GO19014@alvh.no-ip.org>
References: <4735DBDB.5050208@verizon.net>
<16627.1194714491@sss.pgh.pa.us>
<4735FA9F.1080805@verizon.net>
<b42b73150711131628q1469df3el6f557e10de07a05@mail.gmail.com>
<473A5CC0.3060003@verizon.net>
<b42b73150711131936l65b97b9ya7953383673b2710@mail.gmail.com>
<473AE63D.7090305@verizon.net>
<20071114125808.GO19014@alvh.no-ip.org>
Alvaro Herrera wrote:
> Jean-David Beyer wrote:
>
>> How do I reset the counters in pg_stat_database and pg_stat_all_tables?
>> I tried just restarting postgres, but it seems to be saved in the database,
>> not just in the RAM of the server.
>
> There is a function called pg_stat_reset() or some such.
I'll find it.
>
>> I suppose that blks_read and blks_hit are zero because there are 8 GBytes
>> RAM on this machine and I give 2GBytes to shared_buffers = 253000 so that
>> all sits in RAM.
>
> Perhaps you have stats_block_level set to off?
True, I will turn them on.
>
>> I know there have been rollbacks but I do a REINDEX, CLUSTER, and VACUUM
>> ANALYZE before starting the inserts in question.
>
> You do all three on the same tables? That seems pretty pointless. A
> sole CLUSTER has the same effect.
I was only doing this to be sure to clean everything up for this data
gathering process and wanted to know I did not miss anything.
>
>> Do I need to do a VACUUM FULL ANALYZE instead?
>
> No.
>
--
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To: pgsql-performance@postgresql.org
Cc: jeandavid8@verizon.net
Subject: Re: Curious about dead rows.
In-Reply-To: <473B0D19.4000509@verizon.net>
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