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VM with bad Performance (CPU?)

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I have a VM which performs "bad"....checked esxtop for any unnormal symptoms but didnt find anything.

Average cpu usage of 2 vCPUs is arround 50% and more..

Checked with perfmon the pagefile usage, but the pagefile isnt used, memory usage 2GB of 3GB....any ideas?

printscreen of my VM in esxtop is in the attachment (VM name is not visible)

Best Regards Simon Ciglia
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DLeid
Expert
Expert

The posts says he has two vcpus.

I would try the vm with one vcpu and see if that improves the performance.

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11 Replies
AWo
Immortal
Immortal

How many cores does the host have?

VMware Tools installed inside the guest?


AWo

VCP 3 & 4

Author @ vmwire.net

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marcelo_soares
Champion
Champion

Define "bad". There is an specific application that is slow? What kind of application and GuestOS do you have? ESX version?

Marcelo Soares

VMWare Certified Professional 310/410

Technical Support Engineer

Globant Argentina

Marcelo Soares
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VCPGuru
Contributor
Contributor

HA/DRS CLuster with 3 Host each has 8 Cores/2CPU's (No DRS actions have taking place for the last days)

VMware Tools installed

VI3.5 U5

W2k8

Logistic Application which is "sluggish"....

Best Regards Simon Ciglia
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marcelo_soares
Champion
Champion

Ok, so I am considering no other application is slow, like IE or wordpad or solitaire. Try checking on your Edit Settings, resource tab, if the memory is not limited (checked the unlimited box), and also CPU. Reboot the VM and test.

How many vCPUs there are on the VM?

Marcelo Soares

VMWare Certified Professional 310/410

Technical Support Engineer

Globant Argentina

Marcelo Soares
VCPGuru
Contributor
Contributor

No limitations....2vCPUs....CPU %ready value is arround 10%...

please have a look at my posted test.jpg file!

Best Regards Simon Ciglia
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DLeid
Expert
Expert

The posts says he has two vcpus.

I would try the vm with one vcpu and see if that improves the performance.

If you find this or any other information helpful or correct, please consider awarding points.

If you find this or any other information helpful or correct, please consider awarding points.

View solution in original post

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cchesley
Enthusiast
Enthusiast

I agree with the try changing the VM to use 1 vCPU and see if the CPU %ready and the performance of the VM gets any better.

Chris






http://www.vkernel.com

http://www.vkernel.com
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proden20
Hot Shot
Hot Shot

If your 2vCPU's are consistently over 50% perhaps your app could make use of more cores or hyperthreading. I know the drawbacks of SMP, but some apps perform better with more cores to multithread on. How does it perform with 4 cores? If it is significantly faster try that or using shares / reservations.

VCPGuru
Contributor
Contributor

I added 2 vCPUs (The VM is now using 4vCPUs), I will post if this workarround helps.....

Best Regards Simon Ciglia
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DLeid
Expert
Expert

Any updates on your progress? 😐

If you find this or any other information helpful or correct, please consider awarding points.

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VCPGuru
Contributor
Contributor

2vcpus added = problem solved

Best Regards Simon Ciglia
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