You have a SharePoint Server 2010 Service Pack 1 (SP1) server farm. A webpage designer recently modified the home page of a site and added several custom Web Parts to the page. Users report that the home page takes a long time to load. You suspect that a Web Part causes the home page to load slowly. You need to idetify which Web Part causes the home page to load slowly.
What should you do first?
A. Enable Microsoft SQL Server Reporting Services.
B. Enable the Developer Dashboard.
C. Open PerformancePoint Dashboard Designer.
D. Open Performance Monitor.
Correct Answer: B
Explanation/Reference:
Using the Developer Dashboard
SharePoint 2010 4 out of 11 rated this helpful - Rate this topic
Published: May 2010
The Developer Dashboard is an instrumentation framework introduced in Microsoft SharePoint Foundation 2010. Similar in concept to ASP.NET page tracing, it provides diagnostic information that can help a developer or system administrator troubleshoot problems with page components that would otherwise be very difficult to isolate. For example, a developer can easily introduce extra SPSite or SPWeb objects into his or her code unknowingly or add extraneous SQL Server queries.
In the past, the only way to debug performance problems caused by the extra overhead of these instances in code would be to attach a debugger to the code and monitor SQL Server Profiler traces. With the Developer Dashboard, a developer can identify this type of problem, either programmatically by using the object model or visually by looking at page output.
Although performance issues and resource usage information is available in the Unified Logging Service (ULS) logs, interpreting the raw data can be very time consuming. With the Developer Dashboard, all the related information is correlated, which makes identifying these types of issues much easier.
What Information Is Captured?
Developer Dashboard contains an extensible mechanism for measuring various performance counters at various scopes. Within Developer Dashboard, the following performance counters are used to monitor usage and resource consumption at each stage of the requests.
Per-Thread Counters
These counters measure values for the current request or timer job:
Thread execution time
Number, duration, call stack information and query text of each SQL Server query generated by the page
Number, duration, and call stack information of each WCF call
URL or timer job name
Current user
Execution start time
Any of the preceding statistics for code enclosed by SPMonitoredScope (see Using SPMonitoredScope)
The preceding data is output to two locations at the end of every request or timer job:
ULS log -- All collected statistics for a specified scope are always logged to the ULS log.
Developer Dashboard -- Performance statistics for a request are available in the browser window.
http://msdn.microsoft.com/en-us/library/ff512745.aspx
