Viewing multiple perfmon logs “file sets” at the same time.


Applies to:

Windows Threshold Server beta

Windows Threshold (10) beta

Windows Server 2012 R2

Windows 8.1

Windows Server 2012

Windows 8.0

Windows Server 2008 R2

Windows 7

Windows Server 2008

Windows Vista

Windows Server 2003

Windows XP

Windows 2000 Server

Windows 2000 Professional

Windows NT 4.0 Server

Windows NT 4.0 Workstation




You might have setup a perfmon to troubleshoot an issue that you are investigating.

Setting a remote perfmon Windows Server 2012 style...


You decided to create a new file every 100 MB or so…


If you want to view each of these .blg files, you would need to load one at a time…




Now, that is ‘painful’.  You want to view a contiguous timeline.




Add each perfmon that was taken during the ‘timeline’ that you are focusing on:


Click on Apply


Now you have the contiguous timeline of the time frame that you want to focus your troubleshooting or scalability analysis.

Q.  How about if I try adding all the perfmon .blg files at the same time?

A.  You can’t, you will get an error.


You hold down the Shift key and select the perfmon’s that you are interested in.

Click on Open


Notice that the .blg files are missing and you only have the folder path.

As soon as you click on “Apply” or “OK”, you will get the following error message:


Q.  How about .txt or .csv files? 

A.  You cannot.  You will get an error similar to:



If you are a Premier customer, and want to learn more about these tools, we have a few workshops that you should be interested in:

  • Perfmon:

Performance Monitor:  Monitoring Vital Signs workshop

  • Windows Performance Toolkit (WPT) (a.k.a. wpr, wprui, wpa, xperf):

Vital Signs Advanced Workshop

Happy troubleshooting,

Yong ()

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