-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/26/08 18:13, Bob Proulx wrote: [snip] > > I learned about this because I didn't know it when I set up a computer > server pool to be used for some large memory consuming simulations. > They all had 16G of RAM with 64-bit process space. I knew that if > they started swapping that they would run to slowly for us and the > plan was to avoid swapping. If they don't swap they don't need swap > space and so I didn't configure any on them. I came from a Unix > background and didn't expect this different behavior when running on > Linux. We started to see processes randomly stop running. Nothing > was ever logged from the log files for those processes. Large memory > applications never recorded being out of memory. They just stopped > running. A number of folks started cursing Linux for being unreliable > and at that moment for us it was very unreliable! It was from that > experience I learned about the Linux memory overcommit and oom killer > behavior. And with that knowledge I knew that I needed to rebuild the > computer server pool with overcommit off and enough VM. > [snip]
This was a very interesting post. Just now I modified sysconf and boosted swap up to 2x RAM. - -- Ron Johnson, Jr. Jefferson LA USA We want... a Shrubbery!! -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIE9grS9HxQb37XmcRAsdkAKDBvcedxDGJzatjhE2nKipKVvx8IgCcDU4e 4+I4AXDwBSbtp8uuavrBXnY= =SiyN -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
