Different CPU utilization on ESX VMware servers of Netweaver Portal

[Former Member]

Hello,

we are running an Enterprise Portal NW 7.0, SPS20. The application servers are running on 6 ESX VMware servers.

Although all application servers have almost the same amount of user sessions and the same processes on all servers,

always one of the servers have more than the double amount of CPU utilization than all other servers !

We found out, that this phänomen appears, as soon as one of the VM servers is running on a different physical hardware.

As soon as all servers are running on the same physical hardware, the problem does not exist.

Does anyone have experiences with the topic (Portal-)application servers on ESX VMware and different CPU utilization ?

Best regards,

Matthias

[Former Member · Accepted solution]

Hi Matthias,

Can you give some more information that helps diagnose the problem?

-- is it the same VM on other hardware that causes this, or any of the VMs?

-- is it a VM on any other hardware, or a specific hardware that causes this?

With multiple virtual servers, of course, you are crossing virtual boundaries. The increased CPU load could be the VMs trying to handle this Message Server communication between VMs.

Best Regards,

Matt

[Former Member · Accepted solution]

Hi Matt,

to answer your questions:

- it is any of the VM's that is causing the problem

- it is any other hardware that causes it.

This is also my guess, that there is some comunication between VM's, but CPU-load only increases significantly on the one VM that has migrated to another hardware.

Best regards,

Matthias

[Former Member · Accepted solution]

Hi Matthias,

Here is some information that may help you analyze the situation further:

1158363 - vm-support - Exporting Diagnostic Data from VMware

Use 'esxtop'. Helpful information to evaluate the data shown in 'esxtop' can be found in "Performance Analysis Methods" available at:

http://www.vmware.com/files/pdf/perf_analysis_methods_tn.pdf

Furthermore please take note of the following SAP notes and ensure you have set up the extended SAP System Monitoring.

674851 - Virtualization on Windows

1159490 - Virtualization on Windows: Monitoring on VMware ESX

1056052 - Windows: VMware ESX Server 3 configuration guideline

1104578 - Virtualization on Windows: Enhanced monitoring

Hope this helps.

Best Regards,

Matt

[Former Member]

I'd take a look at the processor type and its virtualization features. The NPT feature can reduce the CPU load.