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Step-by-step guide

GUI Profiling

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Enable profiling in Checkmk

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

   Code Block
   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/

   Code Block
   theme RDark
   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.

   Code Block
   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.

   Code Block
   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)

   Code Block
   language bash theme RDark
   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.

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

   
   

.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.

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

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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
   language bash theme RDark
   ➜ ~ 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.

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   • 1. Now we will see two files:

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

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

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

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

        1. Open the profile file via the command line:

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

           
           

        2. Analyze via snakevize as described here: Checkmk profiling#GUIProfiling
           
           

Profile a Checkmk function

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from cmk.utils.profile import profile_call
.....

@profile_call("/tmp/myprofile_dir")
def my_func_to_profile(self):
    print("ding dong")

Analyze a profiling file with python3 but generated on python2

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In this env, you can analyze all profile files generated with python2!

Network Analyze with the Internet browser

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

Slow views

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2023-10-05 14:01:02,467 [10] [cmk.web.slow-views 783147] View name: logfile, User: cmkadmin, Row limit: None, Limit type: none, URL variables: ['csrf_token=deaacdae-e2ad-47bb-a497-8a41c4f5e378', 
'filled_in=filter', 'is_log_notification_phase=-1', 'limit=none', 'logclass0=on', 'logclass1=on', 'logclass2=on', 'logclass3=on', 'logclass5=on', 'logclass8=on', 'logst_h0=on', 'logst_h1=on', 
'logst_h2=on', 'logst_s0=on', 'logst_s1=on', 'logst_s2=on', 'logst_s3=on', 'logtime_from=400', 'logtime_from_range=86400', 'logtime_until_range=3600', 'view_name=logfile', '_show_filter_form=1'], 
View context: {'optservicegroup': {'optservice_group': '', 'neg_optservice_group': ''}, 'siteopt': {'site': ''}, 'log_class': {'logclass0': 'on', 'logclass1': 'on', 'logclass2': 'on', 'logclass3': 
'on', 'logclass4': '', 'logclass5': 'on', 'logclass6': '', 'logclass8': 'on'}, 'log_notification_phase': {'is_log_notification_phase': '-1'}, 'hostregex': {'host_regex': ''}, 'serviceregex': 
{'service_regex': ''}, 'opthostgroup': {'opthost_group': '', 'neg_opthost_group': ''}, 'logtime': {'logtime_from': '400', 'logtime_until': '', 'logtime_from_range': '86400', 'logtime_until_range': '3600'},
'log_state': {'logst_h0': 'on', 'logst_h1': 'on', 'logst_h2': 'on', 'logst_s0': 'on', 'logst_s1': 'on', 'logst_s2': 'on', 'logst_s3': 'on'}, 'wato_folder': {'wato_folder': ''}}, Unfiltered rows: 
24783, Filtered rows: 24783, Rows after limit: 0, Duration fetching rows: 0.69s, Duration filtering rows: 0.00s, Duration rendering view: 18.44s, Rendering page exceeds 3s: 19.21s

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