I have a quad hexacore system based on the Opteron 8345 chips - that's 24 cores in all with 48GB of ram. This box was meant to replace the current six Intel core box which my current LAMP stack runs on. I am however getting even worse performance than from the six core. I'm running:
- Centos 5
- MySQL 5.0
- PHP 5.2.13
- Apache 2.2.9
It's almost as if the box is too powerful? Has anyone had any experience with large SMP boxes like this?
[root@gb-sanguine ~]# uname -a Linux gb-sanguine.bountyonline.local 2.6.18-194.3.1.el5 #1 SMP Thu May 13 13:08:30 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux [root@gb-sanguine ~]# php -v PHP 5.2.13 (cli) (built: Jun 2 2010 16:29:01) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies [root@gb-sanguine ~]# httpd -l Compiled in modules: core.c prefork.c http_core.c mod_so.c [root@gb-sanguine ~]# httpd -v Server version: Apache/2.2.15 (Unix) Server built: Jun 2 2010 11:15:28 [root@gb-sanguine ~]# mysql -V mysql Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (x86_64) using readline 5.1
Please see http://pastebin.com/raw.php?i=KSWxqmJe for dmesg output.
Many thanks in advance for your help folks.