I have a Windows XP PC that I'm using as a server for a couple of apps. Is there a program I can use to monitor the memory usage / CPU load? The PC has Apache and PHP available.
(I don't need fast realtime updates, once every 5 seconds would be fine, I just want to see memory usage + CPU load and make sure my server's not overtaxed)
Perfmon (Performance Monitor) allows you to connect to a remote system if you have administrator credentials.
If you have a unix machine available somewhere you can set it up to poll the load of the windows machine (and a bunch of other statistics) using Munin. You would set up a master collector on a unix machine and a node on the Windows machine (and any other computer you are interested in) using the windows node installer.