The first time I saw it was in TSM 3.7.
Darlene E. Wnukowski
Lead Systems Programmer
Schreiber Foods, Inc.
[EMAIL PROTECTED]
920-455-6268
------------------( Forwarded letter 1 follows )--------------------
Date: Thu, 7 Sep 2000 13:02:58 -0400
To: [EMAIL PROTECTED]
From: John.G.Talafous[Talafous]@TIMKEN.COM
Sender: [EMAIL PROTECTED]
Reply-To: ADSM.Dist.Stor.Manager[ADSM-L]@VM.MARIST.EDU
Subject: Re: Cut MVS CPU Utilization
Does anyone know when the TAPEIOBUFS parameter was introduced to *SM? I did
a search of my ADSM 3.1 documentation and didn't find this parameter. I see
the PTF on IBMLINK and it looks like, maybe, 3.7. Can anyone confirm? I
could really use some CPU relief on OS390 with ADSM 3.1.
John Talafous
Information Systems Technical Principal
Global Software Support - Data Management
telephone: (330)-471-3390
e-mail: [EMAIL PROTECTED]
http://www.ctnvm.inside.tkr/~talafous/
http://www.cis.corp.inside.tkr/networkstorage/
Ask me about free firewood!
-----Original Message-----
From: Darlene E Wnukowski [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 07, 2000 11:26 AM
To: [EMAIL PROTECTED]
Subject: Cut MVS CPU Utilization
I have been able to cut the MVS TSM server's use of CPU from a high of 60%
of
a 7060-H50 to under 10% of a 7060-H50 during backup of tape storage pools. I
did it by changing two parameters in the server parameter file. One of them,
TXNGROUPMAX, is not the one that made the difference but I am including it
because I changed it as well to its maximum value of 256. The parameter that
I
believe had the greatest impact is TAPEIOBUFS. It is documented as being
used
for 3590 tapes but I found a PTF on IBMLink that implies it may also work
for
3480 and 3490 users. The PTF is PQ38991. I would have included it but I'm
not
sure how IBM would feel about that. We have only 3490's for ADSM use and I
set
TAPEIOBUFS to 9. As I said, it made a dramatic difference. I apologize if
this
is old news but I searched the ADSM listserve search site and found no other
reports on this. Let me know if you find this useful. Thank you.
Darlene E. Wnukowski
Lead Systems Programmer
Schreiber Foods, Inc.
[EMAIL PROTECTED]
920-455-6268
Darlene E. Wnukowski
Lead Systems Programmer
Schreiber Foods, Inc.
[EMAIL PROTECTED]
920-455-6268
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