Had a second core, same LPAR, on Power5 for 6 years, still have it on our new Power7, it has never been used.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Wednesday, June 05, 2013 10:23 AM
To: Midrange Systems Technical Discussion
Subject: Re: Cost of Activating Second Processor
Month end is a good thought. We had management, check book in hand, and the problem statement was "how do we reduce the outage caused by month end"? Now, I could do all sorts of fancy measurements and say interactive response time is now this or disk seeks are now this, but the dudes with the checkbook would ask "is our outage caused by month end reduced"? So we did time trials of that. And measured that against the solution we wanted to try. And (software solution) with the 70 day grace period we had enough time to get through three month ends.
Check sent.
Rob Berendt
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From: Sam_L <lennon_s_j@xxxxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>,
Date: 06/04/2013 07:35 PM
Subject: Re: Cost of Activating Second Processor
Sent by: midrange-l-bounces@xxxxxxxxxxxx
Kurt,
Do you have any metrics from before activating the second processor that
you will compare against?
If we get to test a second processor I'd want to have something better
than "it feels faster" or "doesn't seem to have made any difference". I
suppose maybe the elapsed time for our month-end process might be a good
benchmark, but if you have an approach that you can share...
It's not that we have a sluggish machine--compiles are still
satisfyingly fast, but some of our .NET apps that connect to the iSeries
seem to be taking longer to get going, and the boss sees that. Of
course, the network guys have virtualized all the Windows servers and
that might be something to do with it. But it is seems very difficult
to do any measurement on a mixed environment.
Sam
On 6/4/2013 4:44 PM, Anderson, Kurt wrote:
Hi Sam,
I don't have any answers for you, but we recently activated a second
processor and so far we haven't noticed any impact. I wasn't a part of
the decision to get the additional processor, but there must be a way to
get some metrics on your system to see if a second processor would provide
an ROI. Make sure you're up-to-date on PTFs. We're working on the PTF
thing (just about there) and the next step is that there are some reports
that can be ran that cost a couple hundred bucks (so I hear).
-Kurt
midrange.com
