I have started getting problems over the last couple of days with site just freezing up and refusing to respond. I have around 100 site on the server and am having problems trying to diagnose the problem.
Are there any ways / tools that can help me find out what the problem is. The web sites freeze and then usually work fine again if you open a new window.
The server itself isn't crashing, and the CPU and memory usage seems to look OK (no patterns here anyway).
I would be very grateful for any ideas or experiences...?