V6 expire processing pretty much pegs my cpu on a AIX 5.3 p5 machine.
David
>>> Paul Zarnowski <psz1 AT CORNELL DOT EDU> 1/12/2011 11:01 AM >>>
We are just migrating our instances to TSM 6.2.2.0 (from 5.5.4.2). Our
limited experience shows us that DB2/TSM6 is hammering our CPU (mostly
in db2sysc processes). As Roger suggests, we did not ignore DB i/o
bandwidth either, but I am surprised at how much CPU it seems to want.
We have 7 instances (5 active) on 8 (p6) cores, and our CPU is currently
pegged most of the day. I don't know yet whether this is
"expected/normal", or whether we still have some reconfiguring/patching
to do to address this.
..Paul
At 01:35 AM 1/12/2011, you wrote:
>I'd be more worried about database I/O bandwidth. Expiration and
>deduplication are going to hammer the database. All the usual rules
>apply, such as avoiding RAID5, using your fastest disks, using
striping,
>not overloading any one bus, controller, or drive. If you have any of
>these bottlenecks then adding more cores cannot improve performance.
>Poor database disk I/O can kill a TSM system, regardless of its CPU
>resources. If you've got the budget for it, think about using solid
>state storage for the TSM database in order to support multiple
>expiration and deduplication processes.
>
>Roger Deschner University of Illinois at Chicago
rogerd AT uic DOT edu
>"Fine, Java MIGHT be a good example of what a programming language
>should be like. But Java applications are good examples of what
>applications SHOULDN'T be like."
>- pixadel
>
>
>On Tue, 11 Jan 2011, Schneider, Jim wrote:
>
>>Good morning, TSM fans!
>>
>>I'm building an AIX 6 TL4 server to run TSM Server 6.2.2.0. The
>>Performance Tuning manual tells me I need one core per expiration or
>>deduplication process. How many processors are you folks using, and
>>does additional processing power have a significant benefit?
>>
>>Thanks in advance,
>>Jim Schneider
>>
--
Paul Zarnowski Ph: 607-255-4757
Manager, Storage Services Fx: 607-255-8521
719 Rhodes Hall, Ithaca, NY 14853-3801 Em: psz1 AT cornell DOT edu
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