VMware Cloud Community
VCPGuru
Contributor
Contributor
Jump to solution

VM with bad Performance (CPU?)

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
Reply
0 Kudos
1 Solution

Accepted Solutions
DLeid
Expert
Expert
Jump to solution

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

Reply
0 Kudos
11 Replies
AWo
Immortal
Immortal
Jump to solution

How many cores does the host have?

VMware Tools installed inside the guest?


AWo

VCP 3 & 4

Author @ vmwire.net

\[:o]===\[o:]

=Would you like to have this posting as a ringtone on your cell phone?=

=Send "Posting" to 911 for only $999999,99!=

vExpert 2009/10/11 [:o]===[o:] [: ]o=o[ :] = Save forests! rent firewood! =
Reply
0 Kudos
marcelo_soares
Champion
Champion
Jump to solution

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
Reply
0 Kudos
VCPGuru
Contributor
Contributor
Jump to solution

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
Reply
0 Kudos
marcelo_soares
Champion
Champion
Jump to solution

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
Jump to solution

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

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

Best Regards Simon Ciglia
Reply
0 Kudos
DLeid
Expert
Expert
Jump to solution

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.
Reply
0 Kudos
cchesley
Enthusiast
Enthusiast
Jump to solution

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
Reply
0 Kudos
proden20
Hot Shot
Hot Shot
Jump to solution

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
Jump to solution

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

Best Regards Simon Ciglia
Reply
0 Kudos
DLeid
Expert
Expert
Jump to solution

Any updates on your progress? 😐

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.
Reply
0 Kudos
VCPGuru
Contributor
Contributor
Jump to solution

2vcpus added = problem solved

Best Regards Simon Ciglia
Reply
0 Kudos