The script below exports performance data for the last 7 days for a specified list of virtual machines. Data is first stored into a hash table where it is then exported into CSV files using various filters. One CSV file is created per performance metric per virtual machine.

  • You can modify $metrics as needed, see VMWare Performance Counters for a detailed list.
  • The first two lines in the script are only required if executing the script automatically via Task Scheduler using Windows Powershell (and not PowerCLI).
  • The TimeStamp attribute is modified so in Excel it shows as a ‘general’ field, rather than ‘custom’. ‘Custom’ fields were not working correctly when plotting the data into line graphs.
add-pssnapin VMware.VimAutomation.Core


$metrics = "cpu.usage.average","mem.usage.average"
$vms = Get-VM VM1, VM2
$start = (Get-Date).AddDays(-7)
$foldername = get-date -Format "ddMMyyyy"
New-Item -ItemType directory -Path "C:\Perf\$foldername"

$hashtable = get-stat -Entity $vms -Stat $metrics -Start $start | Select -ExcludeProperty Timestamp Entity, MetricID, Unit, Value,@{N="TimeStamp";E={$_.Timestamp.ToString("MMM dd yyyy HH:mm:ss")}} | group Entity, MetricID -AsHashTable -AsString

$vms | ForEach-Object {
    $vm = $_.Name
    $i = 0
    $metrics | ForEach-Object {
        $path = "C:\Perf\$foldername\" + $vm + '_' + $metrics[$i] + '.csv'
        $metric = $vm + ', ' + $metrics[$i]
        $hashtable.$metric | sort-object TimeStamp | export-csv $path -NoTypeInformation -UseCulture

NOTE: I’ve only tested this in vSphere 6.0, although in multiple environments.

Task Scheduler

I used the command powershell.exe -file "C:\Perf\Perf.ps1" in Task Scheduler as below.


Any comments or suggestions welcome.