From: Holger.VanKoll@SWISSCOM.COM
Date: Wed Feb 05 2003 - 12:09:21 EST
www.redbooks.ibm.com
-----Original Message-----
From: Harish Hirani [mailto:Harish.Hirani@T-MOBILE.CO.UK]
Sent: Wednesday, February 05, 2003 6:05 PM
To: aix-l@Princeton.EDU
Subject: Re: WLM (work Load Manager)
Thanks for the info.
I trying to compile report for WLM and I need the info, I am not
going to implement yet until I have found the all the necessary facts of
WLM.
where is best place for info to search.
Also Is there anyway we can power ON and OFF Pseries box
remotley (p610 or p660) with console access only.
Thanks
Harish
-----Original Message-----
From: Holger.VanKoll@swisscom.com
[mailto:Holger.VanKoll@swisscom.com]
Sent: Wednesday, February 05, 2003 3:49 PM
To: aix-l@princeton.edu
Subject: Re: WLM (work Load Manager)
some 5.1 features went in 4.3.3 ML08, but some useful
ones are missing @4.3.3-08 (passive mode, managing io usage, hard
limits)
I can second it can get quite complicated
always start with shares only. if that isnt enough, add
limits, then hard limits
and (as with performance tuning): one small change,
watch the system again, if its not better undo the change
again: careful with limits! f.e. too hard memory-limits
might make a system swap when there is unused memory (in other classes)
-----Original Message-----
From: Green, Simon
[mailto:Simon.Green@EU.ALTRIA.COM]
Sent: Wednesday, February 05, 2003 4:32 PM
To: aix-l@Princeton.EDU
Subject: Re: WLM (work Load Manager)
We haven't done a report, but we use it on some
systems. They're 4.3.3, but it's the same: all the extra bits of WLM
for 5.1 were retro-fitted to 4.3.3 with ML06, (or was it 08?).
At a basic level, it's quite simple to
configure. If you wanted to you could make it very complicated, though.
It really depends on what you want to achieve.
Recommendations from the course I went on and
various other sources are to keep it simple: just do the basics and let
WLM do its job.
It's hard to consider advantages and
disadvantages unless one knows what you're comparing it with.
Why do you want to use it?
There are two general advantages.
1. Allows you to obtain acceptable throughput
for multiple workloads with less outlay on server hardware.
2. Helps you deal with systems which have
occasional very high peak loads.
The only disadvantage is that someone's got to
support it. Oh; and I suppose you should consider that if someone makes
a real hash of it they could make things worse.
Simon Green
Altria ITSC Europe s.a.r.l.
AIX-L Archive at
http://marc.theaimsgroup.com/?l=aix-l&r=1&w=2
AIX FAQ at http://www.faqs.org/faqs/aix-faq/
N.B. Unsolicited email from vendors will seldom
be appreciated.
-----Original Message-----
From: Harish Hirani
[mailto:Harish.Hirani@T-MOBILE.CO.UK]
Sent: 05 February 2003 14:53
To: aix-l@Princeton.EDU
Subject: WLM (work Load Manager)
Hi,
Has any one compiled some sort of report
on Work Load manager (WLM) on AIX 5.1, As I am looking at WLM on AIX
I am trying to find out advantages and
disadvantages of work load manager and how difficult is to configure.
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