Re: [PHP-DEV] Re: Really odd PHP problem

[Russ Garrett]

OK, the situation seems a lot more stable with Zend Accelerator instead 
of mmcache, and we're regularly getting quite a few "checksum failed" 
errors in the logs, which does tend to indicate that shared memory 
corruption was (and still is) happening. But now I don't have to restart 
the damn thing every hour, at least for the duration of the 30-day trial ;).

However, now we've eliminated this problem, another becomes obvious. 
Namely that there does seem to be a small amount of memory leaking - 
likely due to the crashes which are still occurring (i.e. those detailed 
here: http://static.last.fm/phpbug/log.txt).

This results in some Apache children taking up 200MB+ of RAM and 
lingering there, not serving any requests, until they're killed or the 
server is restarted. Regrettably I can't be more specific because the 
location in our code that the crashes happen is random (the location in 
PHP always appears to be zend_variables.c line 44).

Since the httpd processes appear to just hang, the Apache 
MaxRequestsPerChild setting is useless against this.

Thanks *so much* for your help so far, it is most appreciated. We seem 
to be ridiculously unlucky when it comes to these sorts of things...

Cheers,
Russ
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