We have a Drupal website that runs on Apache 2.2 and uses mysql database and php. It runs on a VmWare server with 1gb of Ram and 4 processors. But we are experiencing slowness when connecting to the website, we believe it's a network issue because we did a lot of testing on those servers, the database server running mysql and application server running the drupal website, but everything seemed normal. Those apps running on windows server 2008.
What could cause the network traffic to slowdown?