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Getting Started
Background information regarding this subject is available in our Official documentation
Basics
Check the OMD <SITENAME> performance graphs of the affected
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If the map takes a lot of time to open, you might need to debug further. In this case, we recommend checking the Livestatus queries while reloading the map. |
Network analyze
To see how long the map really needs, we recommend using the network analyzer of your internet browser: Enable Checkmk profilingprofiling#NetworkAnalyzewiththeinternetbrowser.
Debugging with Livestatus
Enable the debug log
How to collect troubleshooting data for various issue types#LivestatusProxy
Debug with the lq queries
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The best way to debug with the lq queries is:
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Detect long-running lq query.
Do you see any:
- bigger lq query
- a log query
- a periodical message
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Livestatus queries#Livestatusqueriesovernetwork
One example
Infrastructure
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OS: Ubuntu 20.4 Version: Checkmk 1.6.0p24 Sites: 1 Central and one Remote |
The map
This is a dynamic map with my remote site as a backend. I created and accessed the map via the central site.
The Debugging
This approach is only if you're running a distributed setup. So, in this case, you can run that command on the central site.
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The whole logfile: lq_nagvis.txt
What I noticed in the logfile
- A significant amount of lq "GET downtimes" commands during the map reload
If I count the "GET downtimes" lines, there are 4836
Code Block language bash theme RDark OMD[mysite]:~$ cat /tmp/lq_nagvis.txt |grep "GET downtimes" |wc -l 4836
- All the other commands look small and reasonable.
Further debugging
I noticed a lot of "GET downtimes" from the log. Whenever I reload the map, my central site sends thousands of commands via livestatus.
When I check my Checkmk site, I set several host downtimes. This could explain why my central site collects all Downtimes before nagvis shows the map.
The Workaround
- Remove all downtimes. The map will open faster
- Access the map directly via the remote site/local site
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We fixed this behavior with Checkmk 2.0. The downtimes will not affect the reload time of the map |
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