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Posted to dev@mina.apache.org by "Jonathan Valliere (Jira)" <ji...@apache.org> on 2021/04/05 23:55:00 UTC
[jira] [Assigned] (SSHD-1153) NIO2 IOServiceFactory, NIO Worker
Threads and the performance
[ https://issues.apache.org/jira/browse/SSHD-1153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Valliere reassigned SSHD-1153:
---------------------------------------
Assignee: Jonathan Valliere
> NIO2 IOServiceFactory, NIO Worker Threads and the performance
> -------------------------------------------------------------
>
> Key: SSHD-1153
> URL: https://issues.apache.org/jira/browse/SSHD-1153
> Project: MINA SSHD
> Issue Type: Question
> Reporter: Susmit Sarkar
> Assignee: Jonathan Valliere
> Priority: Critical
> Attachments: image-2021-03-29-23-52-39-814.png, image-2021-03-29-23-54-01-301.png, image-2021-03-29-23-55-16-337.png, image-2021-03-29-23-55-33-299.png
>
>
> IoServiceFactoryFactory ==> *NIO2, MINA, NETTY*
> How does this works internally, and how performance will be affected with the different IoServiceFactoryFactory.
> We did lots of performance testing and found NIO2 is the best performing of the 3? Why is it the best of the other 2, and why Apache selects it as default. (Tested with 50-75 concurrent threads. Did 2 types of test *[1.] PUT for 1.5kb files for 75 concurrent threads [2.] PUT for 100 MB files for 40-50 concurrent threads*)
> How do NIO Worker Threads affect the performance? Attaching a screenshot from the thread dump which I took
> !image-2021-03-29-23-52-39-814.png!
> All the threads in park state and some are runnable in different phases of execution. I am not able to decipher what does the stacks mean:
> The details which I got are (*PARKED*):
> !image-2021-03-29-23-54-01-301.png!
> For *RUNNABLE:*
> *!image-2021-03-29-23-55-33-299.png!*
> *Lastly, I want to bring this to notice not all threads are used out of 75 threads I see 50 to be in runnable and the remaining 25 to be in the parked state, is it the expected behavior?*
>
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