[jira] [Commented] (FLINK-36022) When scaling.enabled =false, adjust the values ​​​​of some parameters to provide bette recommendation values.

["yuanfenghu (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-36022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17872211#comment-17872211 ] 

yuanfenghu commented on FLINK-36022:
------------------------------------

[~gyfora] [~mxm] [~fanrui] , 
Can express opinion about this jira? Thanks.

> When scaling.enabled =false, adjust the values ​​​​of some parameters to provide bette recommendation values.
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-36022
>                 URL: https://issues.apache.org/jira/browse/FLINK-36022
>             Project: Flink
>          Issue Type: Improvement
>          Components: Autoscaler
>            Reporter: yuanfenghu
>            Priority: Major
>
> h1. Background
> We have enabled AUTOSCALER in some scenarios, but we have not enabled job.autoscaler.scaling.enabled because we only want to use AUTOSCALER to obtain resource recommendations for tasks, but some parameters can cause these recommendations to be inaccurate.
> example ：
>  * job.autoscaler.scale-down.max-factor
> If set to 0.5, it means that the vertex can be reduced to up to 50% of the original value during scaling. If we do not turn on the job.autoscaler.scaling.enabled parameter, then the recommended value here will only be 100 for a vertex with 200 parallelism. But in fact, this may only require 50 or even lower resources during low periods.
>  * job.autoscaler.restart.time
> This parameter will cause the restart event to be used to calculate the resources required to chase data during expansion, resulting in the recommended resources being too large. However, if job.autoscaler.scaling.enabled =false, the restart time will be 0
>  
> h1. Solution:
>  
> When job.autoscaler.scaling.enabled = false, actively modify the above parameters job.autoscaler.scale-down.max-factor=1, job.autoscaler.restart.time=0
>  
>  
>  



--
This message was sent by Atlassian Jira
(v8.20.10#820010)