Detect what (guest) VM consumes host resources

Imagine a small host ESXi (free) hosting a few VMs comments.

In certain circumstances, I guess that among the guest virtual machines increases the use of the resources of the host so that degrade the performance of the global environment.

Can I use get-stat to get the total amount of RAM and CPU, and other resources used by the host.

How can I detect what VM comments, at one point, uses the majority of the resources of the host?

If I use get-stat to query virtual computers invited, how can I get the amount of the resources of the host used rather than the amount of the resources of the customer used?

Should what counters I use?

Concerning

Marius

You can combine counters in 1 call to Get-Stat.

For example, for the use of the CPU, you can use cpu.totalcapacity.average on the node of ESXi and cpu.usagemhz.average on each virtual machine.

Then it's a question of the use of the rule of three to get the percentage.

$esxName = "MyEsx".

$entities = @)

$entities += get-VMHost-name $esxName

$entities += get-VM-location $esx

$stat = 'cpu.usagemhz.average ','cpu.totalcapacity.average '.

Get-Stat - $entities - Stat $stat entity - Realtime - MaxSamples 1 - ErrorAction SilentlyContinue |

Group-object - property Timestamp | %{

$totalCPU = $_. Group | where {$_.} MetricId - eq "cpu.totalcapacity.average"} | Select value - ExpandProperty

$_. Group | where {$_.} Entity.ExtensionData - is [VMware.Vim.VirtualMachine] - and $_. -Eq for instance "- and $_. MetricId - eq "cpu.usagemhz.average"} | %{

New-Object PSObject-property @ {} TypeName

Name = $_. @entity.name

Time = $_. Timestamp

"CPU % ofESXi" = [math]: tour ($_.) Value / $ totalCPU * 100, 2)

}

}

}

For percentages of memory, you can use mem.totalcapacity.average and mem.active.average.

But look at one is expressed in MB, while the other is in KB.

Tags: VMware

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