From: Holger.VanKoll@SWISSCOM.COM
Date: Wed Feb 05 2003 - 10:48:47 EST
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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