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Homework and Emergencies Emergency UNIX and Linux Support How to fix the CPU bound issues on AIX? Post 302860905 by System Admin 77 on Monday 7th of October 2013 01:28:31 PM
Old 10-07-2013
@bakunin

Thank you very much for your analysis. Appreciate your time. This really helps many people like me.


In my Case,
I understand that, i need to increase physical processors (Desired) from HMC. But i see suddenly the CPU usage went down, today it is


Code:
System configuration: lcpu=10 mem=24576MB ent=1.00

 kthr          memory                         page                       faults                 cpu
------- --------------------- ------------------------------------ ------------------ -----------------------
  r   b        avm        fre    re    pi    po    fr     sr    cy    in     sy    cs us sy id wa    pc    ec
  9   0    2568885      36174     0     0     0     0      0     0   121   1184   703  1  1 97  0  0.03   3.5
 13   0    2568885      36172     0     0     0     0      0     0    42    906   522  1  1 98  0  0.03   2.7
  5   0    2568885      36172     0     0     0     0      0     0    10    814   485  0  1 99  0  0.02   1.7
  5   0    2568885      36172     0     0     0     0      0     0     8    815   492  0  1 99  0  0.02   1.7
  5   0    2568885      36169     0     0     0     0      0     0    11   2153   482  1  2 97  0  0.03   3.4

I know that, a particular JVM or DB process consumed lot of CPU (by ruuning topas)
But am not sure, how to tune it. (*Not sure why it went down)

Another Question,

How can we set/decide the number of Virtual CPUs in any LPAR. I mean on what basis ?
in my case,
1 physical --ent
5 virtual ==>> 10 logical CPU

Please give your ideas.

Moderator's Comments:
Mod Comment edit by bakunin: changed "ICODE"-tags to "CODE"-tags. It is easier to read that way.

Last edited by bakunin; 10-08-2013 at 09:22 AM..
 

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WMSMPMON(1)						      General Commands Manual						       WMSMPMON(1)

NAME
wmSMPmon - Window Maker System Monitor SYNOPSIS
wmSMPmon [options] DESCRIPTION
wmSMPmon is a Window Maker dock application that displays the following information about the system: - Current CPU utilization of up to two CPUs - Up to two minutes history of CPU utilization - Current memory usage - Current swap usage On dual CPU systems, wmSMPmon has three different styles for the utilization graph. To toggle between them just click into the graph. OPTIONS
All options start with one dash. -h Show summary of options. -r REFRESH_RATE Set the refresh rate of the graph in microseconds. The default is 250000 (a quarter of a second). -g GRAPH_STYLE Start using graph style #[1-3] (only on dual CPU systems). Style 1 shows the utiliziation in one graph, while 2 and 3 are split in two little graphs. Style 2 shows the two graphs on top of each other. Style 3 uses a mirror like type. The default style is 1, which is also the style used on single CPU systems. -c1 IDX, -c2 IDX On systems with more than 2 CPUs, select the CPUs to show. Per default CPU number 1 and 2 are shown. On a quad CPU systems you may launch second wmSMPmon showing CPUs number 3 and 4. -no-swap Do not monitor swap. SEE ALSO
wmaker(1x) AUTHOR
This manual page was originally written by Alain Schroeder <alain@debian.org> and adapted for wmSMPmon 3 by Thomas Ribbrock <emgaron@gmx.net> WMSMPMON(1)
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