Philip,
What's your paging rate with this configuration? 18 paging volumes seems low
for this amount of storage.
Dennis
"Christmas dawned clear and cold; lovely weather for killing Germans, although
the thought seemed somewhat at variance with the spirit of the day." -- War as
I knew it, by Gen. George S. Patton, Jr.
-----Original Message-----
From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf
Of Philip Tully
Sent: Friday, December 17, 2010 05:33
To: [email protected]
Subject: Re: [IBMVM] Expanded storage question
We have a different situation from you Martha in that we can't add more
central storage. Our current experience is that with a heavily
over-committed lpar large amounts of expanded storage allows for reasonab
le
performance with high paging rates.
I include output from the vir2real exec to see the config we are running,
this is dev/test NOT PROD, and we are increasing xstore to 32Gb this week
end.
Storage information for VM system VLB2
Any userid using NSSes "CMS GCS" are considered CMS users.
Total Virtual storage (only ids not running CMS): 732340 MB ( 715.2 GB)
Total Virtual storage (only ids running CMS): 1200 MB ( 1.2 GB)
Total Virtual storage (all logged on userids): 733540 MB ( 716.3 GB)
Usable real storage (pageable) for this system: 259884 MB ( 253.8 GB)
Total LPAR Real storage: 262144 MB ( 256.0 GB)
Expanded storage usable for paging: 24544 MB ( 24.0 GB)
Total Virtual disk (VDISK) space defined: 17285 MB ( 16.9 GB)
Average Virtual disk size: 98 MB
Virtual to (usable) Real storage ratio: 2.8 : 1
Virtual + VDISK to Real storage ratio: 2.9 : 1
Virtual to Real ratio (non CMS work only): 2.8 : 1
Paging: 18 volumes defined, total space is: 413696 MB ( 404.0 GB)
Total Paging space in use (60% utilization): 248864 MB ( 243.0 GB)
Ready;
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