A Big Thanks to “https://help.directadmin.com/item.php?id=110” Restarting  Apache in one of the Servers failed with “No Space left on the Device ” Error and we have enough space in all available partitions. This is something to deal with Server Kernel semaphores. “On Linux, A semaphore is a System V IPC object that is used to control utilization of … Continue reading Apache – No space left on device / Failed to create proxy Mutex