What Value of ParallelGCThreads should I set


I have 9 servers Elasticsearch: 3 master and 6 datas.
These 9 servers are identical:64 GB RAM, 8 CPU (each cpu has 4 cpu cores).

Which correct value of ParallelGCThreads should I set in java.options.
My Elasticsearch version is 5.6

Many thanks

5.X has been EOL for quite some time now. You should upgrade as a matter of urgency.

We don't recommend changing these.

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