Hi all.

I am running Centos 4.4 with 2.6.9-42.ELsmp.

Here is the situation:
My server host static files of around 500MB average. Most of the connection to the servers are downloading these files.

I set maxclient=800 to test apache.

After 20minutes my maxclient is reached and I have 800 connections. My server load is fine, around 2 average.

My server load stays fine for another 2 hour or so, and then suddenly iowait jumps which causes load to increase.

I could not find the reason why. What could be causing this to happen? Bad Ram? Bad Hard Drive? Bad Raid Card?

I would love to get some suggestions to why this is happen and how could I solve this.

I checked /var/log/messages and didn't really find anything of interest that would be causing this problem.

Thank you.