Setting number of segments to 1

Elastic Stack Elasticsearch
1

Hi all,

I am running a query which is heavy on computing. When performing load testing with a decent load, we see that the ES query takes almost 700 - 800 ms to execute.

Hence, we decided to use the optimize API in ES and set the number of segments to 1. I have given this command to set it

$ curl -XPOST 'http://localhost:9200/your-index/_optimize?max_num_segments=1'

But as and when more documents are added and the index is updated, ES defaults to creating more number of segments and the merging process happens.

Our configuration:
2 Core EC2 instance with 8GB ram.
ES Nodes: 3
Shards per index: 2
Number of replicas: 1
Size of the documents in index: 0.1 Million

Is there any way to permanently set the number of segments to 1?

2

No, segments are automatically created by Lucene.

3

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