[jira] [Commented] (IMPALA-13164) Add metrics for RPC reactor and deserialization threads

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

    [ https://issues.apache.org/jira/browse/IMPALA-13164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17856623#comment-17856623 ] 

Michael Smith commented on IMPALA-13164:
----------------------------------------

Some of this is covered by {{inbound_per_conn_metrics}} in the /rpcz page.

> Add metrics for RPC reactor and deserialization threads
> -------------------------------------------------------
>
>                 Key: IMPALA-13164
>                 URL: https://issues.apache.org/jira/browse/IMPALA-13164
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend, Distributed Exec
>    Affects Versions: Impala 4.4.0
>            Reporter: Michael Smith
>            Assignee: Michael Smith
>            Priority: Critical
>
> When Impala starts to build up a queue in an RPC service, we generally need to start collecting pstacks to identify why the queue is backed up. It would help to have metrics for RPC reactor and deserialization threads to tell when they're fully loaded and building up a queue; this could identify when we need to increase {{datastream_service_num_deserialization_threads}} or {{num_reactor_threads}}.



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