Had alot of errors like...
[16-May-2013 00:00:40 UTC] PHP Warning: require_once(): Unable to allocate memory for pool. in /home/thewebsitename/public/wp-admin/includes/admin.php on line 29
I bumped up the memory for PHP to 384M per instance ... which is 3x the amount. However, that didn't seem to help. Still having a problem.