Re: syslog slowing the database?

From: Vivek Khera <khera(at)kcilink(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: syslog slowing the database?
Date: 2004-03-10 21:00:36
Message-ID: x78yi876yz.fsf@yertle.int.kciLink.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-admin pgsql-performance

>>>>> "GS" == Greg Spiegelberg <gspiegelberg(at)cranel(dot)com> writes:

GS> I've been waiting all day for a pg_restore to finish on a test system
GS> identically configured as our production in hardware and software
GS> with the exception prod is 7.3.5 and test is 7.4.1.

GS> The file it's restoring from is about 8GB uncompressed from a
GS> "pg_dump -b -F t" and after 2 hours the directory the database is in
GS> contains only 1GB. iostat reported ~2000 blocks written every 2
GS> seconds to the DB file system.

Have you considered increasing the value of checkpoint_segments to
something like 50 or 100 during your restore? It made a *dramatic*
improvement on my system when I did the same migration.

--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Vivek Khera, Ph.D. Khera Communications, Inc.
Internet: khera(at)kciLink(dot)com Rockville, MD +1-301-869-4449 x806
AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/

In response to

Browse pgsql-admin by date

  From Date Subject
Next Message Christopher Kings-Lynne 2004-03-11 01:34:54 Re: [PERFORM] syslog slowing the database?
Previous Message Sam Barnett-Cormack 2004-03-10 19:31:15 Re: EPOCH time vs PG timestamp

Browse pgsql-performance by date

  From Date Subject
Next Message Jeff 2004-03-10 23:21:43 Re: compiling 7.4.1 on Solaris 9
Previous Message Mark Harrison 2004-03-10 19:08:50 Re: syslog slowing the database?