How to fetch performance statistics NOT stored in the VirtualCenter database

[herge12]

I'm trying to use VMware Perl SDK to fetch the real-time value of the deviceLatency counter. This counter is available only as a real-time counter, and its value is not stored in the VC database.

I tried tweaking the viperformance.pl script, and did not succeed. The VMware SDK documentation states that "normally, QueryPerf will return performance statistics

stored in the VirtualCenter database". I can get QueryPerf to retrieve real-time value for historical counters, but not for counters available only as real-time.

ESX version is ESX3.5i. Does anybody have a code example of how to do it ?

[lamw]

Take a look at this vSphere SDK for perl script:

It was written against ESX(i) 4.0, have not tested it for VI 3.5, so you would need to test but it should work.

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William Lam

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[cchesley]

What are you trying to measure with device latency? is device latency the same as disk latency?

Chris