On 6/28/07, Romanowski, John (OFT) <[EMAIL PROTECTED]> wrote:
If I set swappiness=0 what does Linux do instead of swapping? What does swappiness=100 mean?
Barton says short answers are the best, so at the risk of being too brief... A higher value of swappiness means that when Linux memory management needs some free memory, it is more willing to swap out a process than to purge data in cache. The idea is that you may not want a single process to wipe out all cached data. On the other hand, you would not want to retain a lot of data in cache if that means much swapping. Most scenarios that I have seen seem to apply to desktop systems. I have not done measurements on systems where swappiness was deliberately set other than default. Rob -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
