Re: memory and page faults (continued)

On Fri, Jan 27, 2006 at 01:48:39PM -0600, Mark Schlechte wrote:

Try nmon while monitoring changes
it shows how parameters are going so it can be
observed better than in vmstat

There is one approach which worked for me in
more or less simmilar situation, using workload manager
to separate load and enable "important" oracle
instances to get enough horsepower to work.
It is quite possible after you get machine tuned
that performance for users will be still not good
so WLM can help

> Since my last post I've been trying to do some research on vmtune etc.
> So I'm looking at something like this on a 6way-6f1 with 8GB of RAM, Oracle, JFS filesystems.
> vmtune -p5 -P10 -f 720 -F 736 -r 2 -R 16
>
> I haven't implemented anything yet.
> Seen some different minperm/maxperm setting suggestions (3-8, 5-10, 15-40).
> Am I better off just doing minperm/maxperm first or do I need the other minfree/maxfree etc.
> settings also?
>
> Just trying to be cautious and I still need to investigate sga_size settings as suggested.
> Also, should I get nmon installed to help me diagnose?
> fyi, I'm also looking at asynch aio settings and my disk layout.
>
> >>>Simon.Green@xxxxxxxxxxxxx 01/23/06 7:25 am >>>
>
> Just checking the paging in vmstat should pretty quickly tell you if the new VMM settings are helping.
> If you want a more detailed look there are various tools that will give you more information, but I'm not sure how valuable any of them would be to you at the moment.
>
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> Simon Green
> Altria ITSC Europe s.a.r.l.
>
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> -----Original Message-----
> From: IBM AIX Discussion List [mailto:aix-l@xxxxxxxxxxxxx] On Behalf Of Mark Schlechte
> Sent: 23 January 2006 14:13
> To: aix-l@xxxxxxxxxxxxx
> Subject: Re: memory and page faults
>
> Thanks Y'all.
> I'll start with vmtune then.
> To monitor my changes then is it a matter of trying to compare vmstat outputs during similar loads?
>
>
>
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