Thanks to all for some really good input.
So the tuning "legend" that the Linux should just "touch" swap is true? But if Linux is going to eat all for file caching, would it not Always eventually swap? Thanks again. Anything that is not a mystery is guesswork. David Dean Information Systems *bcbstauthorized* ________________________________ From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On Behalf Of Jack Woehr Sent: Monday, September 29, 2008 12:55 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: Performance question Dean, David (I/S) wrote: My SLES 10.1 zLinux servers have been notorious for not making much use of the swap space, even when we lower the main (virtualized) in the USER DIRECTORY. Linux uses extra memory for file cache buffers. When the kernel detects memory is short, it just allocates less of them and spends more time accessing the disk. Linux thinks it is its own virtual memory manager. It does not, one imagines, co-operate optimally w/r/t VM. -- Jack J. Woehr # "Self-delusion is http://www.well.com/~jax # half the battle!" http://www.softwoehr.com # - Zippy the Pinhead Please see the following link for the BlueCross BlueShield of Tennessee E-mail disclaimer: http://www.bcbst.com/email_disclaimer.shtm
