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1. Setup → General → Global Settings → User Interface → Profile Request
   
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2. Modify the URL to profile by adding '&_profile=1' and fire the request in your browser

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   language bash theme RDark
   http://localhost/nagnis_master/check_mk/view.py?view_name=allhosts&_profile=

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3. Now two files are created in ~/var/check_mk/

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   root@mylinuxhost:/opt/omd/sites/mysite/var/check_mk# ll |grep multisite -rw-rw---- 1 mysite mysite 100246 Nov 6 13:35 multisite.profile -rwxr-xr-x 1 mysite mysite 155 Nov 6 13:35 multisite.py*

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4. By executing 'multisite.py', you can get runtime statistics about the last processed page.

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   language bash theme RDark
   root@mylinuxhost:/opt/omd/sites/mysite/var/check_mk# ./multisite.py |more Fri Nov 6 13:35:33 2020 /omd/sites/nagnis_master/var/check_mk/multisite.profile 9585 function calls (9480 primitive calls) in 0.007 seconds Ordered by: internal time ncalls tottime percall cumtime percall filename:lineno(function) 1 0.001 0.001 0.002 0.002 /omd/sites/mysite/lib/python/cmk/gui/modules.py:140(_cmk_gui_top_level_modules) 4652 0.000 0.000 0.000 0.000 {method 'startswith' of 'str' objects} ... ...

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5. For viewing multisite. Profile with snakeviz, move the file to another directory (e.g., /tmp), and change the owner to the owner of your Internet Browser.

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   language bash theme RDark
   linuxuser@mylinuxhost:/omd/sites/mysite/var/check_mk$ sudo cp multisite.profile /tmp/ linuxuser@mylinuxhost:/tmp$ sudo chown linuxuser:linuxuser multisite.profile

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6. Install the Python module (for Python 2 or Python 3, respectively)

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   root@mylinuxhost:~# pip install snakeviz root@mylinuxhost:~# pip3 install snakeviz

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7. Now you can use snakeviz to view the profiling file.

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   language bash theme RDark
   linuxuser@mylinuxhost:/tmp$ snakeviz multisite.profile

   
   

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Now you can analyze at which point of the request your view needs the most time!

Profiling via cli

1. The cmk commands have the option to profile them.

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   language bash theme RDark
   OMD[mysite]:~$ cmk |grep profile --profile Enable profiling mode

   
   

2. The profile file will be created in the current directory. Let's go to tmp and run the cmk command with the profile option.

   Code Block
   ➜ ~ su - at OMD[mysite]:~$ cd tmp OMD[mysite]:~$ cmk -Afv --profile

   
   

   Note
   cmk -Afv --profile is only one example. This command will trigger the agent baking via the CLI. You may need to profile a different command.

   
   

   • 1. Now we will see two files:

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        language bash theme RDark
        OMD[mysite]:~/tmp$ ls |grep profile profile.out* show_profile.py*

        
        

     2. To work with these files, we need to copy them outside the site.

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        language bash theme RDark
        OMD[mysite]:~/tmp$ cp show_profile.py profile.out /tmp/

        
        

     3. Now there are two ways to analyze these files:
        
        

        1. Open the profile file via the command line:

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           language bash theme RDark
           ➜ /tmp ./show_profile.py

           
           

        2. Analyze via snakevize as described here: Checkmk profiling
           
           

Profile a Checkmk function

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Network Analyze with the Internet browser

1. Start the Network Monitor
   • Ctrl + Shift + I

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1. • 
     
   • For Firefox, follow this manual: https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor
   • For Google Chrome, follow this manual: https://developer.chrome.com/docs/devtools/network/
     
     
2. Reload the slow/ crashing view again and save/export this file as .har. Please submit this file to us.

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