We have a transactional D.B writing directly to postgres (8.3) and these
parameters have worked ok for us
checkpoint_timeout = 5min
checkpoint_segments = 10
wal_buffers = 1024kB
Date: Wed, 8 Oct 2008 12:34:00 -0200
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: [ADMIN] checkpoint_timeout
CC: [EMAIL PROTECTED]; pgsql-admin@postgresql.org
Hello Brad,
All of my bgwriter parameters is set on default. Following:#bgwriter_delay =
200ms # 10-10000ms between rounds#bgwriter_lru_percent = 1.0
# 0-100% of LRU buffers scanned/round
#bgwriter_lru_maxpages = 5 # 0-1000 buffers max
written/round#bgwriter_all_percent = 0.333 # 0-100% of all buffers
scanned/round#bgwriter_all_maxpages = 5 # 0-1000 buffers max
written/round
I am trying now to increase the checkpoint_segments to 40...
2008/10/8 Brad Nicholson <[EMAIL PROTECTED]>
On Wed, 2008-10-08 at 10:31 -0200, Rafael Domiciano wrote:
> The server is running Postgres 8.2.4
> When the server is doing too much operations like I, U or D the
> postgres stop a while each 5 min...!
> I mean "stopping" that I don't receive any response from postgres, and
> the process the all people are running stay there, waiting for
> something.
> I read a several names to it like: gap, stall, slowdown... I don't
> know the write expression for this situation.
The bgwriter was added to help alleviate this problem.
What are your settings for that? The solution may be to push dirty
buffers to disk more aggressively via the bgwriter so you have less work
to do at checkpoint time.
--
Brad Nicholson 416-673-4106
Database Administrator, Afilias Canada Corp.
