shaneirl

updated

13 years ago

S

shaneirl

15 Posts

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174471

February 12th, 2014 16:00

CPU Ready & Capacity Availability Reporting

I have a question regarding CPU Ready and how it impacts Capacity Availability Reporting.

For example, in one of my clusters, there are a few over-sized VMs that get CPU ready from time to time.

The Summary Report from Foglight Standard shows that the CPU Ready Values for the cluster are as below:

Capture.JPG

I am wondering what this refers to – is it the maximum\min\average\latest CPU ready for individual VMs or across the cluster?

This makes forecasting capacity for new VMs tricky.

Due to CPU Ready being seen as a constraint by Foglight the forecast says there is no capacity in the cluster for new VMs. Yet on a per host level it suggests there is room for many.

I know the cluster level takes into account HA but is the cluster level forecast reporting zero because of the CPU ready status of a couple of VMs? (note there are circa 1000 VMs in the cluster)

My question is a little rambling, apologies, if you have a cluster of 1000 VMs and 10 of those experience CPU Ready – does this mean Foglight will automatically not suggest adding more VMs to that cluster?