# Flowable Process-Instance Performance Testing

**URL:** <https://forum.flowable.org/t/flowable-process-instance-performance-testing/1255>\
**Category:** Flowable Engine\
**Created:** [November 24, 2017, 6:32am UTC](https://forum.flowable.org/t/flowable-process-instance-performance-testing/1255 "2017-11-24T06:32:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mtmanju](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/mtmanju/32/388_2.png) [@mtmanju](https://forum.flowable.org/u/mtmanju)\
**Post date:** [November 24, 2017, 6:32am UTC](https://forum.flowable.org/t/flowable-process-instance-performance-testing/1255/1 "2017-11-24T06:32:15Z")

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Hi Flowable Team,

How many concurrent process requests supported by flowable ?

Example:  
API: [http://localhost:8091/runtime/process-instances](http://localhost:8080/runtime/process-instances)

How many concurrent http requests can be made at a time and how many will execute? is there any limitation ?

Thanks,  
Manjunath

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**Author:** ![PHH](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.flowable.org/phh/32/94_2.png) [@PHH](https://forum.flowable.org/u/PHH)\
**Post date:** [November 25, 2017, 12:21pm UTC](https://forum.flowable.org/t/flowable-process-instance-performance-testing/1255/2 "2017-11-25T12:21:10Z")

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Hi Manjunath,

The main limits are more to do with the environment and stack you’re using. The REST APIs are a thin layer above the Java API (so not much hit there, unless your network/authentication impacts it), then the Java API for querying process instances is mostly limited by the DB performance.

Cheers  
Paul.