High jvm memory

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1

Hello,

We have a cluster composed of 3 masters and 4 data nodes.

Each data node's jvm has 30Go memory allowed. The disk usage on 4 data nodes is around 17 To. There is actually no indexes closed.

We see 2 things :

  1. data node jvm is frequently high ( > 80%).
  2. we already had circuit breaker problem twice

My questions are:

  • What makes jvm using so many memory?
  • Do opened indices are playing a role in that ?
  • Any method to lower this jvm usage ?

Regards

2

Have a look at this webinar as it discusses heap usage and how to reduce it.