There are Graylog nodes on which the garbage collector runs too long. Garbage collection runs should be as short as possible. Please check whether those nodes are healthy. (Node: 89a7651b-46ca-4879-9543-5cbeb84804e6, GC duration: 1369 ms, GC threshold: 1000 ms) What is the best way to resolve this?…

Hey @Chase I found this [image] Nodes with too long GC pauses Graylog Central (peer support) Hey Filisimus, the nodes that error message is referring to appears to be your Graylog nodes. Use the default file locations of the Graylog files here to edit the “JVM Settings”…

your RAM-distibution is not ideal: if you increase your HEAP for a single java process to 32 GB it will do it’s own “magic” and be almost unusable because of internal constrains. on a 64GB RAM machine I would go for 20GB Graylog, 20GB Elastic/Opensearch and the rest for the OS and caches by the OS.…

I currently have 30g allocated to it. I could do more, but we currently have it matching elastic search. graylog-admin@graylog:~$ cat /etc/default/graylog-server Path to a custom java executable. By default the java executable of the bundled JVM is used. #JAVA=/usr/bin/java Default Java options f…

The machine has 128GB of ram. Would you still make the same distribution of ram? While I’d love to have multiple machines right now, there are a few things prohibiting that. Best I can do is to get this machine working and then expand from here. Thanks, Chase

This was very helpful to me - I was very occasionally getting the garbage collector error and bumped up the RAM a bit for the JVM. Hopefully it helps, but I really didn’t see any performance issues before.

So your saying to bring it up above 30GB, say to 40GB? Would this possibly cause any issues with elasticsearch, as elasticsearch will still be stuck at 32? Thanks, Chase

Nodes with too Long GC pauses with maxed ES ram

Graylog Central (peer support)

gsmith (GSmith) February 21, 2023, 12:41am 2

Hey @Chase

I found this

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Nodes with too Long GC pauses with maxed ES ram

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