Set developer dashboard level with PowerShell

To set the developer dashboard level with PoweShell, open the SharePoint 2010 Management Shell Console and run this lines.

#SPDeveloperDashboardLevel is On, Off or OnDemand
$contentService = [Microsoft.SharePoint.Administration.SPWebService]::ContentService
$contentService.DeveloperDashboardSettings.DisplayLevel = ([Enum]::Parse([Microsoft.SharePoint.Administration.SPDeveloperDashboardLevel], 'OnDemand'))
$contentService.DeveloperDashboardSettings.Update()

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