Best practices is to use Vdisk for swap, and reduce linux virtual machine sizes - not to
buy more REAL z/VM memory unless you really need it. "101% memory useage" means almost
nothing. It is not relevant to performance or capacity, and thus shouldn't have business
decisions or performance decisions decided based on that number.
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. We may have something just not configured optimally
somewhere, but our luck has gone with adding main Linux memory and
subsequently having to add ZVM memory.
David Dean
Information Systems
*bcbstauthorized*
________________________________
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Mary Anne Matyaz
Sent: Monday, September 29, 2008 11:31 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Performance question
If your VM system is at 101% memory usage, and you are overcommitted by
about 14%, is it worthwhile to add
a vdisk to a linux for swap space, or better just to add main memory to
the linux?
MA (Looking for opinions, thoughts, rationalizations, whatever. :)
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