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March 03, 2006
HOW-TO: Tune Settings In sysctl.conf
http://www.webhostingtalk.com/archive/thread/257654-1.html
After you make the changes to the file, you can make them effective immediately by typing in /sbin/sysctl -p. You can also set them by echoing the values as root into their paths in /proc/sys.
Also, you will need to issue sysctl -w net.ipv4.route.flush=1 to flush the routing table to make some of these changes happen instantly.
Newer version: http://forum.ev1servers.net/showthread.php?s=&threadid=48880
Posted by Roy at March 3, 2006 06:53 PM