I would like to thank everyone for their help and advice. I don't think it is impossible to figure out what the underlying issue is, but I made a bunch of changes based on the recommendations here.
1) I switched the hardware (pretty easy, since it's just a Xen instance) 2) I upgraded Apache and PHP 3) I changed max requests per child to a sensible number rather than unlimited. I think log rotate would achieve a similar effect by restarting the webserver every day and I'll eventually go that route. 4) I set up monitoring scripts that will dump the output of `ps` and `apache2ctl fullstatus` to a log in the event the apache craps out again, and I'll be sure to get a gdb dump if it happens again. 5) For other reasons, I reduced the Keep-Alive time and moved most of the static content to Amazon's CDN. Thanks for the help. Regards, John Campbell _______________________________________________ New York PHP User Group Community Talk Mailing List http://lists.nyphp.org/mailman/listinfo/talk http://www.nyphp.org/show_participation.php