My issue is that these servers are taking rather long for request about 2 seconds on average just to serve files. When we had just one server doing everything it was noticeably faster even with the same web app (Drupal 6 and Drupal 7). I want to get this number down to a reasonable level and so I need some help getting to the bottom of why the request times are so slow.
This can cause the webapp to hang on post or put and generally leads to a bad user experience on my sites.
PS: I am more of a server newbie so this has confounded me for quite some time.
The domains:
collabornation.net
nptrainingworks.com
(they run off the same two webservers using vhost configs)
The Gear:
Two Rackspace 4 Gig servers running CentOS 6.2 Final
They have a mounted file system (gluster) that is used to keep files the same on both machines. They are behind a rackspace load balancer running round robin. Mysql is run using php-pdo and php-mysql as such mysql is run on another instance running memcache on that machine with phpMyAdmin located there as well.
Apache version number 2.2.15-15.el6.centos.1 (httpd.x86_64)
Varnish version number 3.0.2-1.el5 (varnish.x86_64)
PHP version number 5.3.14-1.el6.remi (php.x86_64)
Configs Linked Below
Again need some help, much appreciated!
Best Answer
Start looking into the database and connections to and from the database instance (hopefully a separate server) from the web server. You may be experiencing high wait times on your database, in which case you'll need to performance tune the database.