>I'm getting intermittent apache crashes saying "child pid (nn) exit
signal Arithmetic exception (8)" in the error log since the day and
hour I installed a new php-4.3.10 upgrade with gd added. I've found
some float handling errors in the php test suite, even with gd and
mysql and all extras except zlib removed from the config. An associate
suggested checking out zend.
I find that if you re-install a new version of PHP, or even the
same version of PHP compiled with slightly different options, and
you don't stop and restart apache ("apachectl graceful" doesn't do
the job), apache will dump core fairly soon after the installation.
Sometimes it will spawn children which dump core immediately, leaving
the main process running but doing nothing useful. This observation
comes mainly from FreeBSD but has also been seen on Tru64. Once
you restart apache, it's fine again until you start reinstalling
stuff used as a shared library or plugin by apache.
This isn't limited to apache and PHP, either. Just about any
daemon process (mysql, snmpd, exim, sendmail, etc.) seems to do it.
Gordon L. Burditt