# Parallel Execution - CPU / RAM Bottleneck and Crashing

**URL:** <https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196>\
**Category:** Feature Request\
**Tags:** feature-request, katalon-studio\
**Created:** [July 23, 2018, 2:13pm UTC](https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196 "2018-07-23T14:13:49Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Tom\_Longhurst](https://avatars.discourse-cdn.com/v4/letter/t/6f9a4e/32.png) [@Tom\_Longhurst](https://forum.katalon.com/u/Tom_Longhurst)\
**Post date:** [July 23, 2018, 2:13pm UTC](https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196/1 "2018-07-23T14:13:49Z")

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Have a test suite collection of around 40 test suites.  
Have tried to execute these in parallel, but booting up 40 instances doesn’t leave the machine happy, and half of them crash, leaving some in the state of ‘incomplete’ or ‘not started’.

Perhaps allow a ‘maximum threads’ option, which will only boot up that amount, queue the remaining, and when one finishes, let another one start?

I tried creating my own parallel runner through the command line and I had a similar issue. It boots up about 40 instances of katalon which has the same effect 😕

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**Author:** ![Zarashima](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/zarashima/32/928_2.png) [@Zarashima](https://forum.katalon.com/u/Zarashima)\
**Post date:** [July 24, 2018, 5:03am UTC](https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196/2 "2018-07-24T05:03:22Z")

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We will plan to have this option in later releases to limit the number of allowed threads for parallel executions. Having unlimited threads at the moment is not a good option because it will consume machine’s resources too much

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**Author:** ![roadbike](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/roadbike/32/16103_2.png) [@roadbike](https://forum.katalon.com/u/roadbike)\
**Post date:** [October 6, 2020, 8:07pm UTC](https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196/3 "2020-10-06T20:07:04Z")

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Has the option to limit the number of allowed threads for parallel executions been implemented?

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**Author:** ![albert.vu](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/albert.vu/32/20595_2.png) [@albert.vu](https://forum.katalon.com/u/albert.vu)\
**Post date:** [August 8, 2022, 7:31am UTC](https://forum.katalon.com/t/parallel-execution-cpu-ram-bottleneck-and-crashing/12196/4 "2022-08-08T07:31:48Z")

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Archived on August 8, 2022, 7:31am UTC