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Re: Pet Peeves?

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Erik Jones <ejones(at)engineyard(dot)com>
Cc: wstrzalka <wstrzalka(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: Pet Peeves?
Date: 2009-02-06 23:24:22
Message-ID: 20090206232422.GF3089@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-general
Erik Jones escribió:

> One workaround I came up with a while back for that is to edit the stat 
> file name to be in a separate directory under global (like  
> <datadir>/global/pg_stats/pgstat.stat) and mount a ramfs there.  Of  
> course, a custom compile isn't always an option but it removed a *ton*  
> of IO on that db (had thousands upon thousands of tables).  Also, if you 
> do that you need to be sure to copy pgstat.stat to a permanent place 
> periodically unless you want to risk losing all of your stats.

Hmm, you don't really need to copy it periodically -- you need to do it
on shutdown only.  If the system crashes, the recovery code will delete
the pgstats file anyway.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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