About once an hour, when TraceLedgerEvent.TookSnapshot is written to the log, there is a CPU spike and at the same time the slotMissedNum is increasing. Is this a bug in the node? Or is there a fix?

cardano-node v1.27.0 CPU 6Core Mem 16GB enter image description here

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    +1. Welcome to our new community and thank you so much for contributing your question here! We hope to see much more of you in the future !!! Please take a look at the edits that I suggested since they may improve how well your question is received here. Aug 23 '21 at 19:18

That CPU usage spike is only at most 8% of the CPU capacity, which is extremely small. I get spikes on my laptop CPU of 100% for longer time intervals than the spikes here, when just casually browsing the web.

If anything is being written anywhere on the computer, or anything is happening such as slotMissedNum increasing, I would expect a CPU usage spike of around the size of the extremely small spikes you're seeing here.

I hope that takes care of the CPU spikes part of the question. If you believe that the increasing of slotMissedNum is a bug, then that's a different matter, for which I'm not immediately able to offer a solution, but that bug can be addressed entirely independently since the CPU spikes do not create any additional concerns.

  • Some of you have pointed out the same problem, what do you think? github.com/input-output-hk/cardano-node/issues/2731 Aug 23 '21 at 22:24
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    To clarify on the above answer, this spike occurs when it rights the state of the ledger in memory to disk at an interval. As the above comment states, it's a very small spike. If we didn't do this periodically, you'd have to rebuild the entire ledger state from scratch every restart of the node. Oct 15 '21 at 13:09
  • I think you mean, as the above answer indicates. Oct 15 '21 at 18:21

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