Memory spikes in Druid pods (especially Historical)


We monitor CPU and Memory usage with Prom/Grafana and we noticed some spikes in the JVM Memory Used. I’m trying to figure out what is the root cause of these spikes…

It goes sometimes over my -xmxlimit so I increased it but I want to be sure that that won’t increase again and again in the future.

Exemple of 4 spikes (~6Gb), while the memory is ~100/200Mb in normal time

HOW can we explain that and secure these increases ?

Have you tuned? You might also look at cleaning up your metadata.

No, so far no tuning and concerning the cleaning metadata, we set up it yes.
@Mark_Herrera do you think that the +UseG1GC can solve the issue ?

I’d certainly give it a try. Let us know how it goes.

Using G1GC is absolutely a recommended best practice.

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