I would personally highly recommend using pgBouncer! I have been using
this in production migrating from MySQL and have had phenomenal success
with it combined with lighttpd and php as an internal information
system. I am getting on average 300 requests per second very low load
average as it is maintaining between 10 and 20 DB connections throughout
the day.
I would also recommend splitting the application server and the DB
server if at all possible. Doing this would make it possible to do
horizontal scaling by way of a reverse proxy in front of the application
server.
The overhead I experienced of natively running Postgres with PHP was a
performance killer. Connecting to the DB and disconnecting was killing
the CPU - as it seems with your problem.
What is the nature of the application which will be running on this
server?
Best of Luck!
Richard Carnes
-----Original Message-----
From: Kenneth Marshall [mailto:ktm@rice.edu]
Sent: Wednesday, February 02, 2011 1:32 PM
To: Cesar Arrieta
Cc: pgsql-performance@postgresql.org
Subject: Re: Server Configuration
On Wed, Feb 02, 2011 at 03:15:22PM -0300, Cesar Arrieta wrote:
> Hi, I have a Server with Fedora Core 11, Tomcat and Postgresql 8.3.
> With Hardware:
> * 8GB RAM
> * 8 processors Intel Xeon E5520 @2.27GHz
> * 250GB SATA DISK
>
> Actually, it serves at most 250 connections.
> The problem happends when it serves many many connections at a time,
tables
> and queries began to get blocked, then I have to kill some processes
> in order to allow other people continue working.
>
> Wich recommendations could you give me for to configure
postgresql.conf, and
> could it be eficcient to buy another server with almost same hardware
> in order to use pgPool2 with replication, load balance and parallel
query?.
It sounds like you may just need a connection pooler (pgpool, pgbouncer)
and it might work just fine.
Cheers,
Ken
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