| From: | Greg Smith <greg(at)2ndquadrant(dot)com> |
|---|---|
| To: | Thom Brown <thombrown(at)gmail(dot)com> |
| Cc: | PGSQL Mailing List <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Reducing excess files in pg_xlog |
| Date: | 2010-03-22 16:06:34 |
| Message-ID: | 4BA7958A.6050702@2ndquadrant.com |
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| Thread: | |
| Lists: | pgsql-general |
Thom Brown wrote:
> I noticed there's 66 files in my pg_xlog directory. I changed my
> checkpoint_segments from 32 to 3 as I noticed it was too high,
> restarted PosgreSQL, but there are still 66 files in that directory
> and they're taking up about 1.1G.
> How can I get this list of files down?
A checkpoint after there's been some write activity in the database
should reduce this down to a reasonable number. If the system has been
idle since the last checkpoint, it doesn't do anything when you ask for
another one, which includes skipping this cleanup; that may be why you
haven't seen it drop yet.
I'm assuming you don't have WAL shipping turned on by setting
archive_command. There can also be an excess of these segments that
can't be cleaned up if your archiving scheme fails.
--
Greg Smith 2ndQuadrant US Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.us
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