How to get a core dump from apache when segfaulting

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http://serverfault.com – I've followed instructions from many locations online on how to get a core dump from apache when it is producing a segfault, but it still refuses to generate the dump. I have: Added the CoreDumpDirectory directive into the httpd.conf file and set it to /tmp Executed ulimit -c unlimited Provided the pattern for dumps using echo '/tmp/core-%e.%p' > /proc/sys/kernel/core_pattern Also ran echo 0 > /proc/sys/kernel/core_uses_pid Httpd has been restarted, but still no dumps created. I'm running CentOS 5.8 x64 with httpd-2.2.3-65.el5.centos.3 and php-5.3.20-13.el5.art Any hel (HowTos)