Sponsored Content
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..
 

9 More Discussions You Might Find Interesting

1. AIX

AIX 5.3 Issues

We are planning to move to AIX 5.3 and we would like to know if someone has had any 'bad' experiences with it. We have a 32PE p690 Regatta and currently we are running the latest AIX 5.2 with the latest patches. Has anyone any interesting points to mention when transitioning to AXI 5.3? Is... (1 Reply)
Discussion started by: miket
1 Replies

2. AIX

If the AIX need reboot after install fix pack or APAR?

After install fix pack or APAR, if aix need reboot? if not, do we need stop database and all applications before we install fix pack or APAR? (3 Replies)
Discussion started by: rainbow_bean
3 Replies

3. AIX

IY17981 fix required for aix 4.3.3 to aix 5L migration but not found

Hi, redbook documentation is telling that IY17981 fix is required for aix 4.3.3 to aix 5L migration. But there is no mention about that fix in any ML installation packages. - My system is ML11 : oslevel –r 4330-11 - But xlC.rte is on wrong version : lslpp -L xlC.rte xlC.rte ... (3 Replies)
Discussion started by: astjen
3 Replies

4. AIX

AIX filter Issues

Hi, I want to print from AIX 5.3/6.1 using 'pr' preprocessing filter and 'PCL' print file type. Steps: 1. Smitty 2. Print Spooling 3. Create a print queue(remote->Generic) 4. change the attributes for that print queue. 5. Change print file type to PCL and... (1 Reply)
Discussion started by: meeraramanathan
1 Replies

5. AIX

How to install AIX Fix Pack 5300-06-06-0811

Hi All, I have this fix for AIX (5300-06-06-0811) and i need to install it. How can i do this? What are the prerequisites for this fix? Thanks (1 Reply)
Discussion started by: lucaxvu
1 Replies

6. AIX

APAR fix on AIX 53tl9

We have tried to install an APAR fix IZ20298 on a AIX test server. It is requiring a base level of bos.adt.prof of 5.3.0.0 I cannot find this file anywhere. I fould 5.3.0.1 and it still will not install without the base install. Any ideas where I can find bos.adt.prof 5.3.0.0? (1 Reply)
Discussion started by: daveisme
1 Replies

7. AIX

AIX CPU use

Hi Could somebody explain me how AIX is using CPU?? For example when we have 2 processors system is giving all task to one of them till 100% is used ?? Or it's depend on configuration or anything else ?? Best regards enda (3 Replies)
Discussion started by: enda
3 Replies

8. AIX

AIX Fix Pack update

Hi All, i'm try to update my aix 6100.06.05 to 6100.07.00. i download the 4,5 GB of FixPack buy i don't have a required package (devices.chrp.pci.rte 6.1.7.0) This package does not exist on the fix pack (i've check in the .toc file and in the .bff files) On ibm website i see that this... (0 Replies)
Discussion started by: Zio Bill
0 Replies

9. AIX

AIX CPU waits

Guys, I have a question - when nmon reports a sizeable %CPU wait, does that mean - 1) IO operations are slowing CPU down, OR 2) paging slowing the CPU down, OR 3) one cant tell?? I thought the nmon documentation clearly suggested that CPU waits reported in nmon were from disk... (4 Replies)
Discussion started by: getback0
4 Replies
CPU(8)                                                        System Manager's Manual                                                       CPU(8)

NAME
cpu - A tool for user and group administration SYNOPSIS
cpu [OPTIONS] DESCRIPTION
CPU is a tool for user administration, that was initially based on FreeBSD's pw(8). This tool will allow you to administer users and groups on several different backends currently including LDAP and flat files. Please see the website http://cpu.sourceforge.net for more informa- tion, or help improve the man page. OPTIONS
There are two kinds of options; options for CPU and options for CPU modules. There are only four options for CPU, they are as follows: -C configfile, --config configfile The configuration file to be used by CPU. The options in this file are used for CPU modules. -h, --help Display help for CPU. If specified in conjunction with the -m option the help for that particular module is displayed. -M method, --method=method This is the method of administration. Current options are ldap or passwd (passwd is not yet working). This can be specified in the configuration file. -V, --version Display the version of the software. SEE ALSO
cpu.conf(5) cpu-ldap(8) AUTHORS
Blake Matheny <bmatheny@purdue.edu> The current version of this software is always availabe at http://cpu.sourceforge.net BUGS
To report a bug or problem, please e-mail: cpu-users@lists.sourceforge.net TODO
See TODO file that accompanied software. Please e-mail us with any additional suggestions. 17 February 2003 CPU(8)
All times are GMT -4. The time now is 07:15 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy