Opening a Perfmon .blg file from the command line


I want to be able to open a previously-captured .blg file in perfmon via a CMD box.  I'm sure I had it working but I've lost the command format.  I tried this:

22/10/2016  08:55    <DIR>          .
22/10/2016  08:55    <DIR>          ..
12/10/2016  14:53         3,598,842 u_ex161012.log
12/10/2016  14:48        36,433,896 web01_00001_20161012151754.pcap
12/10/2016  14:48        85,983,232 web01_10121517.blg
               3 File(s)    126,015,970 bytes
               2 Dir(s)  152,643,452,928 bytes free

C:\traces\Contoso_01\web01>perfmon web01_10121517.blg

Open in new window

but it just throws an error stating that Perfmon has received an invalid parameter.

Thanks in advance...Paul
Who is Participating?
Joe Winograd - EE Fellow & MVEConnect With a Mentor DeveloperCommented:
Hi Paul,
Well, I may have been wrong about there being other ways to do it in a CMD prompt. NVIT just posted how to do it in its own GUI window, but I'm guessing you already knew about that and that it isn't what you want. I think you want to feed a .BLG file to perfmon.exe via the command line (as can be done with relog.exe), but I'm not aware of any way to do that. Regards, Joe
Joe Winograd - EE Fellow & MVEConnect With a Mentor DeveloperCommented:
Hi Paul,
There are surely other ways to do it, but a really nice method is to use the built-in relog tool to convert it to a CSV file, which then gives you a ton of flexibility when opening it with Excel (or even a text editor). You may see the options via:

relog -?

Open in new window

A sample call would be:

relog -f csv web01_10121517.blg -o web01_10121517.csv

Open in new window

Regards, Joe
PaulOffordAuthor Commented:
Hi Joe,

Thanks for the note about relog.  Yep - that works fine but I need to open the file in Perfmon.  I'm sure I had this working before.

Best regards...Paul
Keep up with what's happening at Experts Exchange!

Sign up to receive Decoded, a new monthly digest with product updates, feature release info, continuing education opportunities, and more.

NVITConnect With a Mentor Commented:
To open the blg file...

1) Click start>>run
 2) Type perfmon and press enter
 3) In system monitor select and remove the counters currently shown by hitting the delete button
 4) Click the fourth button that says "View log data" this button has a cylinder icon
 5) Point and open the blg file.
 6) To view the log you can click the + sign button which is the 8th button on the top. add the counters and objects that you want to view.
 7) You can also adjust the graph scale by clicking inside the graph.
 8) To highlight a particular counter line, select the bulb icon on the top and click on a counter or a line in graph.
PaulOffordAuthor Commented:
Hi Joe and NVIT,

Joe is quite right, I want to open the file directly from the command line and not via the GUI.   If I rediscover how to do this I'll post the answer here.

Best regards...Paul
Joe Winograd - EE Fellow & MVEDeveloperCommented:
The comment selected as the Accepted Solution posits that feeding a .BLG file to [b]perfmon.exe[/b] via the command line can't be done. This is never what the asker wants to hear, but is an acceptable answer, as discussed in this EE article:

If anyone knows how to do this, please post here and take down the closing. Otherwise, selecting that as the Accepted Solution with half the points, but also giving credit to the other two posts with work-around solutions (and splitting the remaining 250 points between those two posts).
PaulOffordAuthor Commented:
After looking at this for ages I've finally discovered the command format.  It is:

perfmon /sys /open .\web01_10121517.blg

Open in new window

On my PC (Windows 10) I have to run CMD as Administrator.  Without these privileges I get an empty graph.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.