# Does adding multiple shard replicas increase performance?
**URL:** https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694
**Category:** Elasticsearch
**Created:** [February 27, 2017, 9:26pm UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694 "2017-02-27T21:26:07Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@aghosh1](https://discuss.elastic.co/u/aghosh1)
#### Post date: [February 27, 2017, 9:26pm UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/1 "2017-02-27T21:26:07Z")
Currently we have one index with 5 shards and 1 replica per shard. is it possible to boost performance by increasing number of replicas or is it just fail-safe
Regards
Arnab
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 28, 2017, 12:19am UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/2 "2017-02-28T00:19:43Z")
It's both.
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### Author:  [@aghosh1](https://discuss.elastic.co/u/aghosh1)
#### Post date: [February 28, 2017, 6:07am UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/3 "2017-02-28T06:07:09Z")
Thanks Mark. is there a thumb rule for determining the ideal set up ?
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### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 28, 2017, 7:58am UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/4 "2017-02-28T07:58:54Z")
More than 0 if your data is important, is about it.
Anything else depends on how important the data is, the query speed, and more.
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### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [February 28, 2017, 8:10am UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/5 "2017-02-28T08:10:39Z")
Increasing the number of replica shards generally affects query throughput more than latency, even though being able to utilise resources more efficiently across a cluster can have an impact on latency too.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 28, 2017, 8:10am UTC](https://discuss.elastic.co/t/does-adding-multiple-shard-replicas-increase-performance/76694/6 "2017-03-28T08:10:40Z")
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