AIX

Yes, the load seems alarming.
nmon should show you, which processes/application are the cause of this. If not on day time, setup nmon for continuous logging.

For security reasons I can't review the nmon-file. It would be helpful when you post the output from

Code:

mpstat -wa

Code:

lparstat -H

Code:

lssrad -av

In my opinion Your LPAR-Design isn't really good.

There are some realy good articels from Nigel Griffith which i recommend to read:

https://www.ibm.com/developerworks/m...ats133?lang=de

and please search for "local near far memory part " on google.

Local, Nar & Far Memory part 5 - Low Entitlement has a Bad Side - IBM
Local, Nar & Far Memory part 6 - Too High a Virtual Processor - IBM


You have 40 Online Virtual CPUs with SMT 4x enabled =
160 logical CPUs but only 4 phyical CPUs (Entitled Capacity)

I would suggest to reduce the amount of virtual CPUs (start with 4) and if this is not enough try to increase the amount of virtual CPUs and Entitled Capacity.

If Your processes are not multi threaded aware or they are not enough processes which can be scheduled, it should be helpful to disable SMT.

load average - what do you mean?

The paging space # of 2.4% does not really mean much, because you have too much paging space to begin with. You can just turn them off the two extra ones with the swapoff command (and perhaps later rmps to remove them permanently).

vpundit: I was not aware that the rest of UNIX had caught up with AIX - and using memory for file cacheing - good to hear.

regarding the ratio of entitled capacity to virtual processors: your ratio of 1:10, while legal is not considered best practice. as mentioned "xRay" paying attention to SRAD information is important.

use the mpstat command to see if you are using a single thread on each processor - if so, count the actual processors being activated, divide that number in two and use that as your number of VP - that should lower your physical processor cost.

lparstat output is important to see "app" value - as an estimate of how busy the system as whole is busy.

but in all honesty, there is so much that needs to be done, it is all patchwork until some proper settings are applied, and all testing restarted.