My server spikes to 40-60% CPU load every 15 minutes or so, this has been happening since 2020. February (see the attached images below).
The processes that cause the spikes are:
- rrdtool
- rrdcached
This did not happen before, what's going on? 
[HELP] Consecutive CPU spikes every ~15 mins
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- OMV 4.x
- nitpwn
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nitpwn
Changed the title of the thread from “Consecutive CPU spikes every ~15 mins” to “[HELP] Consecutive CPU spikes every ~15 mins”. -
I'm having a similar issue. Seems to have started after I switched from a USB drive to SSD-based install (transfer from backup; uninstalled flash2ram plugin)). Running on a Dell R320 Server (Xeon, 24GB RAM). Generally idles at 2-5% CPU, but has regular spike to ~14% that seem to driven by an RRDTools process.
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