Have checked your memory using memtest? Signal 11 could be a sign that there is something wrong with the hardware. Especially if the same configuration on other host is ok.
Another option is to replicate whole server to some virtual (kvm) host and try if it happens there as well. I am afraid that without more information (gdb backtrace), and step-by- step guide how to reproduce the error, nobody will be able to help you. -- Mailing from php5 module fails when number of Apache VirtualHosts is above +/-1500 https://bugs.launchpad.net/bugs/419191 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs