problem with apc in fast-cgi ... need help to track it down

Hi there, thats the current situation: I'm using php-fastcgi (4.4.0-pl3-gentoo) together with litespeed webserver (2.1.5) on gentoo-linux. Recently I start seeing problems with php crashing and leaving those kinds of errors in the stderr-log: FATAL: erealloc(): Unable to allocate 61440 bytes FATAL: emalloc(): Unable to allocate 45870 bytes FATAL: erealloc(): Unable to allocate 245760 bytes FATAL: erealloc(): Unable to allocate 245760 bytes FATAL: erealloc(): Unable to allocate 245760 bytes FATAL: emalloc(): Unable to allocate 46023 bytes FATAL: emalloc(): Unable to allocate 46023 bytes FATAL: emalloc(): Unable to allocate 45870 bytes I'm not using memlimit and the memory is also not filled up yet. I tried both apc-3.0.8 and apc-3.0.6 with its default settings of one shm-segment with 30M of size, tried php-4.4.1 too ... all the same problems. Mostly I get those errors in the logs with egroupware ... but as its only a dev-server I can't put more load on it to see if the error occurs in other apps in the same manner. Any idea how to track this bug or configuration problem down to its cause? Anything I could try? Thanks in advance, Thomas