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Performance guideline for Windows and Unix memory : Page In Page Out
Hi,
Our BMC Patrol & CA Unicentre have been collecting memory statistics
( Page In / Page Out) all these years for Windows 2003 & Unix (Solaris,
Redhat Linux & HP-UX) and one senior director asked what's the industry
guideline of healthy or unhealthy values for these memory readings.
Q1:
Any website / inputs will be appreciated.
Q2:
I think for Unix memory, it's the "Scan rate" that matters & I think I saw
one thread in a forum that suggested that "Scan rate" above 5 is unhealthy.
That thread also mentioned that for Unix, "Page Out" value above 5 is
unhealthy while "Page In" value is immaterial. Are these suggestions correct?
Q3:
If the above suggestions are valid, would occasional one second spike of
above 5 (for scan rate & Page Out) a cause for concern or we have to have
the value sustained at above 5 for say over a period of time (say 10 seconds?)
Q4:
Are the above suggestions for Unix valid for Windows?
Q5:
What about Windows, what's a good indicator of memory health & at what
threshold value we should consider adding memory? Are the "Free Memory"
shown in Windows Task Manager a good indicator, ie if the value of "Free
Memory" is less than 5% of the total physical memory, then it becomes a
cause for concern?
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by: robocatPosted on 2009-08-25 at 15:16:36ID: 25182847
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