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Step-by-step guide

1. GUI Profiling

   1. Enable profiling in Checkmk

      Info
      SETUP→ General → Global Settings → USER INTERFACE Don't use 'Enable profiling for all request'. This option will profile a Multisite request randomly and you and at the most of the time it will be the slowest one.

      
      
      

   2. Install Python module

      Code Block
      language bash
      root@cmk-VirtualBox:~# pip install snakeviz root@cmk-VirtualBox:~# pip3 install snakeviz

      
      

   3. Modify the URL to profile by adding '&_profile=1'

      Code Block
      language bash
      http://localhost/nagnis_master/check_mk/view.py?view_name=allhosts&_profile=1

      
      

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

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

      
      

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

         Code Block

         root@klappanas:/opt/omd/sites/nagnis_master/var/check_mk# ./multisite.profile.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/nagnis_master/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} ... ... ... ...

         
         

      2. 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

         Code Block
         language bash
         anastasios@klappanas:/omd/sites/nagnis_master/var/check_mk$ sudo cp multisite.profile /tmp/ anastasios@klappanas:/tmp$ sudo chown anastasios:anastasios multisite.profile

         
         

   5. Now you can use snakeviz for viewing the profiling file

      Info
      Code Block anastasios@klappanas:/tmp$ snakeviz multisite.profile

      
      

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

2. Network Analyze with the internet browser

   1. Start the Network Monitor

      Info
      Ctrl + Shift + I or 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. Now reload the slow/ crashing view again and save/export this file as .har. Please submit this file to us

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