Why does headless IRI fullnode without PoW keep CPU at 100%?

Question

I am running 24/7 headless IRI fullnode on an i3 workstation with 32Gb RAM. My fullnode is almost always sinchronized with the tangle.

I run the node with the option:

--remote-limit-api "removeNeighbors, addNeighbors, interruptAttachingToTangle, attachToTangle, getNeighbors"

Why does IRI running keep the CPU at 100% even if nobody is launching PoW on it?

Update

After upgrading to IRI 1.4.1.4 the CPU is less frequently at 100%. Probably this is due to a better management of the invalid transactions.

my cpu is sometimes at over 200%, lol. I heard about even higher numbers (I guess, that depends on the amount of cores). — codepleb, Dec 20 '17 at 20:43

score 1 · Answer 1 · answered Dec 20 '17 at 23:45

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you may consider using something like cpulimit to throttle it. You can get it with your package manager. On apt systems: sudo apt install cpulimit Run top, and find your Process ID for IRI. Then you can initiate cpulimit for that process with proper privileges: cpulimit --pid 13131 --limit 71 --background

This will help to throttle your cpu to 71 % ont he iri process, if IRI was running with a PID of 13131 (check top).

answered Dec 20 '17 at 23:45

proto

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Thank you, cpulimit is very useful and effective. – blockmined Dec 21 '17 at 10:36

score 1 · Answer 2 · answered Dec 21 '17 at 06:20

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You also may want to check your incoming traffic. In my case the CPU load is directly proportional to the incoming traffic.

The incoming traffic in the image below is caused by one single neighbor suddenly sending a lot of data to the server.

answered Dec 21 '17 at 06:20

Daniel F

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Why does headless IRI fullnode without PoW keep CPU at 100%?

2 Answers2