Hi all, Server is currently experiencing freeze ups once or twice a day. I don't see any errors in the logs, and mysql process list shows only null queries. Is this related to APC? Is there a relationship between the apc.shm_size setting and kernel.shmmax? The server is on a standard ubuntu setup with shmmax setting unchanged at 32mb. apc.shm_size is currently set at 256 - if I set it at 32mb, the