Maximum Heap Size for Server with 192GB RAM

Elastic Stack Elasticsearch
1

Good day everyone. I spend some time read up the maximum heap size can be allocated for ElasticSearch Server, most of it said recommend maximum of 32GB or 1/2 of your physical memory.

I have a server with 192GB of Ram, can I allocate the heap size of 96GB? or maximum support at 30GB?

2

It's not recommended to go above 30gb.
With that size of RAM you can think of running 2 data nodes of 30gb each and 1 master node with something like 8gb of heap.

IMHO.

3

Thanks for the info.

I think I will convert the machine into KVM to run 2 nodes ES. Currently it's a single node ES machine, no cluster.

4

My index is create by date, daily. i.e data-20201027, each index is around 300GB of size.

Should I create like 10 shards and 1 replica (to maintain 30GB per shard) on the 2 data nodes?

5

May be with that size of data, you can have only one node per machine. The RAM will be used for the file system cache.

6

Thanks. Let me try out multiple node and single node, to find out the different. :slight_smile: Thanks.

7

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