# Load Testing on Temporal. Has anyone done a basic load testing on Temporal project?

**URL:** <https://community.temporal.io/t/load-testing-on-temporal-has-anyone-done-a-basic-load-testing-on-temporal-project/3989>\
**Category:** Community Support\
**Tags:** java-sdk, helm, cassandra, web-ui\
**Created:** [February 15, 2022, 7:08am UTC](https://community.temporal.io/t/load-testing-on-temporal-has-anyone-done-a-basic-load-testing-on-temporal-project/3989 "2022-02-15T07:08:23Z")\
**Posts on this page:** 1\
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**Author:** ![tihomir](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/tihomir/32/6580_2.png) [@tihomir](https://community.temporal.io/u/tihomir)\
**Post date:** [February 15, 2022, 4:08pm UTC](https://community.temporal.io/t/load-testing-on-temporal-has-anyone-done-a-basic-load-testing-on-temporal-project/3989/2 "2022-02-15T16:08:39Z")

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Temporal provides the [Maru load simulator](https://github.com/temporalio/maru) which is specific to workflows written using the Go SDK.  
As for scalability, there are production use cases which have hundreds of millions open workflows at any time.

From your error it seems that workflow workers either cannot connect to Temporal service, or are having issues handling the test loads. Would recommend [this forum post](https://community.temporal.io/t/tuning-temporal-setup-for-better-performance/539/5) for a Java SDK specific worker tuning tips.

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