goodface
Enthusiast
Enthusiast

%CSTP

we use 5.5 u2 esxi and one vm has co-stop on cpu but cpu ready doesnt seem. vm has 12 vcpu. we see  read I/O latency on vrealize . what is problem ?

2 Replies
paramoyoo
Enthusiast
Enthusiast

Hi

I guess that you have checked whether consolidation is needed?

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Finikiez
Champion
Champion

Hello!

Where do you check %CSTP value? If you look into esxtop output be aware that you need to devide the value by the number of vcpus. Or expand GID to see CSTP value for a particular vcpu.

The most common reason for a high CSTP value is a snapshots. If you have many snapshots for a VM or a very old and big snapshot this can make a big impact on CSTP value.