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This manual should give you an overview of some common Round Robin Database (RRD) issues we have seen over time. You can use this as a kind of checklist to go through for troubleshooting step by step. |
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After converting the RRD files to the new format (described here: https://docs.checkmk.com/latest/en/graphing.html#rrdformat) RRD storage format, in some rare cases, it might happen that data is still written to ~/var/pnp4nagios/perfdata/<hostname>.
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To get rid of that, please follow that manual: Error handling with RRD files after conversion to the new format
Cannot create a graph
It seems like the .rrd file is missing. Please double-check with the cmc.log:
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OMD[mysite]:~$ tail -f var/log/cmc.log 2022-06-02 12:09:41 [4] [main] [rrd] [rrdcached at /omd/sites/mysite/tmp/run/rrdcached.sock] >> -1 No such file: /opt/omd/sites/mysite/var/check_mk/rrd/<HOSTNAME>/CPU_Utilization_Packet_CPU_1.rrd 2022-06-02 12:10:41 [4] [main] [rrd] [rrdcached at /omd/sites/mysite/tmp/run/rrdcached.sock] >> -1 No such file: /opt/omd/sites/mysite/var/check_mk/rrd/<HOSTNAME>/CPU_Utilization_Mgmt_CPU.rrd 2022-06-02 12:10:41 [4] [main] [rrd] [rrdcached at /omd/sites/mysite/tmp/run/rrdcached.sock] >> -1 No such file: /opt/omd/sites/mysite/var/check_mk/rrd/<HOSTNAME>/CPU_Utilization_Packet_CPU_0.rrd |
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