In this post we will discuss about Developer Dashboard in SharePoint 2010.
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The Developer Dashboard use to show performance and tracing information for a SharePoint page in a control on the page itself. By default the Developer Dashboard is disabled. We can enable it by using Windows PowerShell. Run the below Script for enable the Developer Dashboard. There are also different ways to enable developer dashboard. You can check a full article here
Add-PSSnapin microsoft.sharepoint.powershell -ErrorAction "SilentlyContinue"
Now you see the Developer Dashboard in your Site Page. See in fig
By using the dashboard we can see Web Server, Asserts and Critical Events, Database Queries, Service Calls, SPRequest Allocations and WebPart Events Offsets.