# PARTICIPANT\_BACKPRESSUE on AWS environment

**URL:** <https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295>\
**Category:** App Development\
**Tags:** canton\
**Created:** [March 17, 2023, 8:38am UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295 "2023-03-17T08:38:05Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![raphson93](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/raphson93/32/6033_2.png) [@raphson93](https://forum.canton.network/u/raphson93)\
**Post date:** [March 17, 2023, 8:38am UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295/1 "2023-03-17T08:38:06Z")

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We are using c6i.12xlarge (48vCPU, 96GB ram) for our AWS EC2 Instances:

> **[Amazon EC2 C6i Instances - Amazon Web Services](https://aws.amazon.com/ec2/instance-types/c6i/)**
>
> Amazon EC2 C6i instances are powered by 3rd generation Intel Xeon Scalable processors and deliver up to 11% better price performance compared to C5 instances.

After following all the suggestion listed [here](https://docs.daml.com/2.6.0/canton/usermanual/performance.html#configuration),  
we still hit the BACKPRESSURE issue during the performance stress test:

 ![image](https://canada1.discourse-cdn.com/flex028/uploads/daml/original/2X/e/e6efe87e5cff0a0de63ad4e2da01845e2867de6e.jpeg)

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**Author:** ![raphson93](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/raphson93/32/6033_2.png) [@raphson93](https://forum.canton.network/u/raphson93)\
**Post date:** [April 30, 2023, 4:21pm UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295/2 "2023-04-30T16:21:44Z")

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Tested with Canton v2.6.3 and attached log for investigation:

> **[canton-dump-2023-04-26T01-43-35.525972300Z-pn-backpressure.zip](https://drive.google.com/file/d/1E9BIwpFS79ScWiFce5B_Ugw0CPjKrDdv/view?usp=sharing)**
>
> Google Drive file.

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**Author:** ![Mate\_Varga](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/mate_varga/32/2308_2.png) [@Mate\_Varga](https://forum.canton.network/u/Mate_Varga)\
**Post date:** [May 1, 2023, 9:50am UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295/3 "2023-05-01T09:50:35Z")

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Hi @raphson93,

Could you please try to tune the resource limits, increasing the defaults as well?

Kind Regards,  
Mate

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**Author:** ![raphson93](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/raphson93/32/6033_2.png) [@raphson93](https://forum.canton.network/u/raphson93)\
**Post date:** [May 1, 2023, 10:34am UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295/4 "2023-05-01T10:34:59Z")

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Hi @Mate_Varga , below is my current resource limits:  
 ![image](https://canada1.discourse-cdn.com/flex028/uploads/daml/original/2X/8/88fda21381f4cdae7fa549db6a29e793a6d9df8b.png)

Any rules of thumb for the 3 parameters listed ?

Thanks and have an awesome day.

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**Author:** ![Mate\_Varga](https://yyz2.discourse-cdn.com/flex034/user_avatar/forum.canton.network/mate_varga/32/2308_2.png) [@Mate\_Varga](https://forum.canton.network/u/Mate_Varga)\
**Post date:** [May 1, 2023, 11:23am UTC](https://forum.canton.network/t/participant-backpressue-on-aws-environment/6295/5 "2023-05-01T11:23:45Z")

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Hi @raphson93,

The rules of thumb is described on the documentation page you have linked. What kind of load you are trying to run with? Do you know the parameters mentioned in the docs?

Kind Regards,  
Mate