Performance tuning with System Control (sysctl) in UbuntuOct 30, 2008, 13:06 (0 Talkback[s])
[ Thanks to dave for this link. ]
"The parameters available are those listed under /proc/sys/. Procfs is required for sysctl support in Linux. You can use sysctl to both read and write sysctl data.Many of the tunable performance items can be configured directly by the kernel. The command sysctl is used to view current kernel settings and adjust them."