Li Lu commented on YARN-3407:

Performance tuning for timeline v2 is a comprehensive problem. Instead of 
fixing those default values one by one, I think we may want to address the big 
problem as a whole, after we're reached into a stable phase for timeline v2. 
Since this JIRA is only a small part of performance tuning and has been hanging 
for more than a month, I'm proposing we close this JIRA as a won't fix. 

> HttpServer2 Max threads in TimelineCollectorManager should be more than 10
> --------------------------------------------------------------------------
>                 Key: YARN-3407
>                 URL: https://issues.apache.org/jira/browse/YARN-3407
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>    Affects Versions: YARN-2928
>            Reporter: Varun Saxena
>            Assignee: Varun Saxena
> Currently TimelineCollectorManager sets HttpServer2.HTTP_MAX_THREADS to just 
> 10. This value might be too less for serving put requests. By default 
> HttpServer2 will have max threads value of 250. We can probably make it 
> configurable too so that an optimum value can be configured based on number 
> of requests coming to server. Thoughts ?

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