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High GC time on all NodeManagers, 1-10s range

High GC time on all NodeManagers, 1-10s range

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Hello,

I'm currently dealing with a lot of slow performance issues on my cluster, and I'm looking at Grafana metrics to try and see if I can find anything wrong. That's when I came across all of my NodeManagers in the 1-10 sec GC. I feel like this is very very bad. Typical GC should be under 500ms right?

19597-gc-time-prod.png

Does this indicate an issue? Should I be worried?

Running Ambari 2.5.1 and HDP 2.6.1.

Thanks

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