How to fix the CPU bound issues on AIX? Post: 302864341

Sponsored Content

Homework and Emergencies Emergency UNIX and Linux Support How to fix the CPU bound issues on AIX? Post 302864341 by System Admin 77 on Wednesday 16th of October 2013 10:23:55 AM

10-16-2013

Registered User

@bakunin

Thanks much for your time and analysis. Currently we've 1 physical CPU and 24G Memory

Desired /ent phyisical CPU --> 1
Number Of Processors: 5 (5 virtual CPUs ==> 10 logical CPUs)

Again i saw heavy CPU utilization . So' in my case i feel that, decreasing Vcpus is a better idea. (I will give a try, Please correct me if i am wrong)
vmstat o/p

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
  2   0    2708260      51589     0     0     0     0      0     0    93   9670  1484 96  3  1  0  1.00  99.9
  3   0    2708260      51588     0     0     0     0      0     0    77  10082  2037 96  3  1  0  1.00  99.7
  3   0    2708260      51589     0     0     0     0      0     0    44   8894  1459 97  2  1  0  1.00 100.1
  2   0    2708260      51587     0     0     0     0      0     0    72   8744  1553 96  3  1  0  1.00  99.7
  1   0    2708260      51587     0     0     0     0      0     0    79   7693  1899 91  3  6  0  0.96  95.6
  2   0    2708260      51586     0     0     0     0      0     0    47  10890  1915 96  3  1  0  1.00  99.6
  2   0    2708260      51587     0     0     0     0      0     0    60   9296  1407 96  3  1  0  1.00  99.6
  2   0    2708260      51587     0     0     0     0      0     0    44   5306  1233 94  2  3  0  0.97  97.5
  4   0    2708260      51587     0     0     0     0      0     0    49  10082  1802 95  3  1  0  1.00  99.8

And
sar command output

Code:

#sar 2 15
System configuration: lcpu=10 ent=1.00 mode=Capped

10:36:31    %usr    %sys    %wio   %idle   physc   %entc
10:36:33      87       3       0      10    0.98    97.8
10:36:35      95       4       0       1    1.00    99.6
10:36:37      97       2       0       1    1.00    99.5
10:36:39      90       4       0       6    0.95    95.3
10:36:41      96       3       0       1    1.00    99.7
10:36:43      97       2       0       1    1.00    99.8
10:36:45      96       3       0       1    1.00    99.8
10:36:47      89       2       0       8    0.99    99.4
10:36:49      96       3       0       1    1.00    99.8
10:36:51      97       2       0       1    1.00    99.7
10:36:53      87       3       0      10    0.98    97.7
10:36:55      58       3       0      39    0.67    67.0
10:36:57      96       3       0       1    1.01   100.7
10:36:59      97       3       0       1    1.00    99.7
10:37:01      88       2       0      10    0.98    97.6

Average       91       3       0       6    0.97    96.8

Thank you, really appreciate your time and ideas.

Last edited by System Admin 77; 10-16-2013 at 11:38 AM..

System Admin 77

View Public Profile for System Admin 77

Find all posts by System Admin 77

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...

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. 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 ...

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...

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

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?

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

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...

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...

9 More Discussions You Might Find Interesting

1. AIX

AIX 5.3 Issues

Discussion started by: miket

2. AIX

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

Discussion started by: rainbow_bean

3. AIX

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

Discussion started by: astjen

4. AIX

AIX filter Issues

Discussion started by: meeraramanathan

5. AIX

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

Discussion started by: lucaxvu

6. AIX

APAR fix on AIX 53tl9

Discussion started by: daveisme

7. AIX

AIX CPU use

Discussion started by: enda

8. AIX

AIX Fix Pack update

Discussion started by: Zio Bill

9. AIX

AIX CPU waits

Discussion started by: getback0