From: Josh Berkus <josh@agliodbs.com>
To: pgsql-hackers@postgresql.org
Subject: wal_buffer tests in
Date: Wed, 27 Jul 2005 13:30:01 -0700
Message-ID: <200507271330.02083.josh@agliodbs.com> (raw)
Folks,
I ran a wal_buffer test series. It appears that increasing the
wal_buffers is indeed very important for OLTP applications, potentially
resulting in as much as a 15% average increase in transaction processing.
What's interesting is that this is not just true for 8.1, it's true for
8.0.3 as well.
More importantly, 8.1 performance is somehow back up to above-8.0 levels.
Something was broken in June that's got fixed (this test series is based
on July 3 CVS) but I don't know what. Clues?
Test results are here:
http://pgfoundry.org/docman/view.php/1000041/79/wal_buffer_test.pdf
As always, detailed test results are available from OSDL, just use:
http://khack.osdl.org/stp/#
where # is the test number.
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: josh@agliodbs.com, pgsql-hackers@postgresql.org
Subject: Re: wal_buffer tests in
In-Reply-To: <200507271330.02083.josh@agliodbs.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox