On 6/7/06, Brian France <[EMAIL PROTECTED]> wrote:

it must be the XSTORE pages I see in the FCX115 display. XSTORE pages :

Indeed, looking at the book this is one of the screens I remembered.
For rates reported, it is important to know over what interval it is
being computed. As far as I know PerfKit takes the time between
pressing ENTER while looking at the screen. This is only useful when
the metric itself does not change a lot. Paging however is typically
burst-wise, so doing random intervals only serves recreational
purposes. You'd probably want to look at a period of time with fixed
intervals. That's probably easier with IND USER

 Page-in rate             The number of pages paged in per second.

 Just didn't know what the difference was. I'm not swapping from what I can
tell, but there is paging and I just don't know what the difference is.

So this is what I suggested: the paging that z/VM does to retain the
virtual machine in main memory. Depending on the amount of pressure in
z/VM, you can see large portions of the virtual machine being paged
out once. You need to look at some more numbers to tell (because just
paging out does not slow the virtual machine down).

Rob
--
Rob van der Heij
Velocity Software, Inc
http://velocitysoftware.com/

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