Really odd PHP problem (redux)

(The original thread is here: http://www.zend.com/lists/php-dev/200409/msg00073.html) OK, so quite a lot has changed since my last post. The web server is now running Debian 3.1 as opposed to 3.0, and I've been horrendously busy so I haven't had time to investigate this any further. However, our trial of ZPS is about to expire, and although it's a great bit of software, to be completely honest we don't really have the the money to buy it currently. So I switched back to mmcache to see if the problem had gone away. It hasn't, and we're still getting the problem detailed in my initial post: in short, every so often a process will eat 25% of the RAM and hang. After a while, so many of these processes accumulate that they bring the server down. I have managed to catch one of these processes and analyze it, a log of which is available here: http://static.last.fm/phpbug/1.txt I did try APC again as an alternative to mmcache, however that still doesn't work for me, I managed to collect some more info here, however I don't have time to pursue this bug much further at the moment (I swear I have the worst luck ever): http://static.last.fm/phpbug/apcbug.txt Is it still likely that mmcache is the cause of this? If so, any ideas on the APC bug? Thanks in advance, Russ Garrett russ@last.fm