From: | Greg Smith <gsmith(at)gregsmith(dot)com> |
---|---|
To: | Dan Armbrust <daniel(dot)armbrust(dot)list(at)gmail(dot)com> |
Cc: | pgsql general <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Checkpoint Tuning Question |
Date: | 2009-07-08 19:40:28 |
Message-ID: | alpine.GSO.2.01.0907081538290.14242@westnet.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
On Wed, 8 Jul 2009, Dan Armbrust wrote:
> My takeaway is that starting the checkpoint process is really
> expensive - so I don't want to start it very frequently. And the only
> downside to longer intervals between checkpoints is a longer recovery
> time if the system crashes?
And additional disk space wasted in hold the write-ahead logs. You're
moving in the right direction here, the less checkpoints the better as
long as you can stand the recovery time. What you'll discover if you bump
checkpoint_segments up high enough is that you have to lengthen the test
run you're trying, because eventually you'll reach a point where there are
none of them happening during some test runs.
--
* Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD
From | Date | Subject | |
---|---|---|---|
Next Message | Scott Marlowe | 2009-07-08 19:45:42 | Re: Oracle Help in PG? |
Previous Message | Greg Smith | 2009-07-08 19:37:32 | Re: Checkpoint Tuning Question |