One problem I had under Fedora Core 4 was that occasionally, some memory-leaking process would eventually use up all of the server’s swap space, and the server would stop responding to everything but ping. I’d have to send in a reboot request and wait for the next hang. This evening, the same thing happened again, despite the fact that I’m running a new OS, new version of Apache, new version of PHP, new version of MySQL, etc, etc. Any ideas on how I can set up monitoring to make sure this doesn’t happen again?