| 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 |
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| 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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