Message-ID: <45110543.6020501@streppone.it>
Date: Wed, 20 Sep 2006 11:09:23 +0200
From: Cosimo Streppone <cosimo@streppone.it>
User-Agent: Mozilla Thunderbird 1.5 (X11/20051201)
MIME-Version: 1.0
To: Postgresql Performance List <pgsql-performance@postgresql.org>
Subject: Update on high concurrency OLTP application and Postgres 8 tuning
Content-Type: text/plain; charset=ISO-8859-15; format=flowed
Content-Transfer-Encoding: 7bit

Hi all,

I was searching tips to speed up/reduce load on a Pg8 app.
Thank you for all your suggestions on the matter.
Thread is archived here:

http://www.mail-archive.com/pgsql-performance@postgresql.org/msg18342.html

After intensive application profiling and database workload analysis,
I managed to reduce CPU load with application-level changes.

For database overload in presence of many concurrent
transactions, I found that just doing an "ANALYZE" on sensible
relations makes the situation better.

I scheduled a cron job every hour or so that runs an analyze on the
4/5 most intensive relations and sleeps 30 seconds between every
analyze.

This has optimized db response times when many clients run together.
I wanted to report this, maybe it can be helpful for others
out there... :-)

-- 
Cosimo