# Will replica's do same amount of work as primaries?

**URL:** <https://discuss.elastic.co/t/will-replicas-do-same-amount-of-work-as-primaries/195044>\
**Category:** Elasticsearch\
**Created:** [August 13, 2019, 2:29pm UTC](https://discuss.elastic.co/t/will-replicas-do-same-amount-of-work-as-primaries/195044 "2019-08-13T14:29:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![eightnoteight](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/eightnoteight/32/38526_2.png) [@eightnoteight](https://discuss.elastic.co/u/eightnoteight)\
**Post date:** [August 13, 2019, 2:29pm UTC](https://discuss.elastic.co/t/will-replicas-do-same-amount-of-work-as-primaries/195044/1 "2019-08-13T14:29:25Z")

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Hi,

for our cluster, now the disk is not an issue anymore but the cpu is, if I increase the replica's how much increase cpu usage should I expect?

is it 2x of the previous usage? i.e will the replica's do the same amount of work as the primary shards?

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**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [August 26, 2019, 1:39pm UTC](https://discuss.elastic.co/t/will-replicas-do-same-amount-of-work-as-primaries/195044/2 "2019-08-26T13:39:48Z")

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Yes, replicas normally do the same amount of work as primary shards.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 23, 2019, 1:39pm UTC](https://discuss.elastic.co/t/will-replicas-do-same-amount-of-work-as-primaries/195044/3 "2019-09-23T13:39:51Z")

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