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Opening a Perfmon .blg file from the command line

Posted on 2016-11-05
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Last Modified: 2016-12-23
Hi,

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

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

Thanks in advance...Paul
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Question by:PaulOfford
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Assisted Solution

by:Joe Winograd, EE MVE
Joe Winograd, EE MVE earned 375 total points (awarded by participants)
ID: 41875611
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 -?

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A sample call would be:

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

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Regards, Joe
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by:PaulOfford
ID: 41875705
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
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LVL 23

Assisted Solution

by:NVIT
NVIT earned 125 total points (awarded by participants)
ID: 41875751
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.

https://social.technet.microsoft.com/Forums/windowsserver/en-US/a7bfb9dc-f845-4138-b603-ee1da3d04f2e/performance-monitor-perfmon-how-to-open-blg-file?forum=winservergen
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LVL 52

Accepted Solution

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Joe Winograd, EE MVE earned 375 total points (awarded by participants)
ID: 41875757
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
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LVL 2

Author Comment

by:PaulOfford
ID: 41895050
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
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LVL 52

Expert Comment

by:Joe Winograd, EE MVE
ID: 41900314
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:
http://support.experts-exchange.com/customer/portal/articles/755964

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).
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LVL 2

Author Comment

by:PaulOfford
ID: 41936022
After looking at this for ages I've finally discovered the command format.  It is:

perfmon /sys /open .\web01_10121517.blg

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