Operating System Tuning
		• Key Metrics – Memory used/free/cache/buffer • Swapping is very bad • You might even disable swap – Paging and page faults • Make sure there’s no memory pressure • Server variables might be wrong if many page faults – Disk I/O • Make sure the I/O is where you expect • Disk I/O tuning (see your OS docs) – Processes running, sleeping, blocked/waiting – Actual CPU usage (might be too low)
			Copyright 2003, Jeremy Zawodny