we have a local apache 2.2.3 server on CentOS running a local PHP website. About half of the office is able to load the php pages the others will wait for about 1 minute or longer before the server will respond. When the response finally arrive the user is not able to interact with the page. It is like its totally dead.
Restarting apache is no help. Changing browsers does not help either. apache error_log and access_log does not show anything in particular.
I really have no idea where to look for a solution for this issue.
UPDATE: I found out the apache has no issue displaying normal html pages for these users. It is only php pages.