Originally Posted by unSpawn
That raises a lot of questions:
- What is the application (is it up to date BTW?) and what are the requirements the vendor lists?
- What are the systems specs and does it show (excessive?) resource consumption over time (Atop, Collectl, sar)?
- What is "slow"? How does Apache show resource consumption over time (Apache Top, MySQL Top)?
- What do system and damon logs say in the time leading up to being "slow"?
- In which way are your system, web server, database and application configuration different from the defaults? Or phrased differently: what performance tweaks have you already tried?
*Please note these questions don't encompass everything plus the kitchen sink so you're invited to actively explore your system and post any other seemingly related information too.
I'm sending the replies of your questions and more information.
- The application isn't up to date we are developing the new version soon. And the server has available resources.
- We are using Cacti to monitor the server and there is no high usage of memory and CPU.
- The first page is a login page, which uses only some php includes to create the login page. Nothing about DB connections or something else and etc.
- The same system runs in all Virtual Hosts, first and second virtual hosts does not affected this kind of slow. For Example, if I open the page now, I can login and use the system. But if I try to make the same procedure in 30 minutes, the login page simply does show to me. Is something like a "render" issue, which doesn't happens with the other virtual hosts.
- There is nothing being generated in the logs. When this happens, the CPU and Memory usage still are low.
- For while I didn't made any changes in Apache to solve this, because I don't know too much of apache tunning.
Thanks a lot for the help!