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https://issues.apache.org/jira/browse/IMPALA-13137?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17852811#comment-17852811
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Surya Hebbar commented on IMPALA-13137:
---------------------------------------
Hello, just for clarification could you please walk me through this example.
{code:sql}
select sleep(1000) from tpch.region;
{code}
On running this statement, the following is the result we get for the two
columns.
!very_short_fetch_timer.png|width=916,height=83!
As it can be seen here, the fetch time is very small. Is this what is being
expected, or is it the difference between first row fetched and last row
fetched?
> Add additional client fetch metrics columns to the queries page
> ---------------------------------------------------------------
>
> Key: IMPALA-13137
> URL: https://issues.apache.org/jira/browse/IMPALA-13137
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend, be
> Reporter: Surya Hebbar
> Assignee: Surya Hebbar
> Priority: Major
> Attachments: completed_query.png, in_flight_query_1.png,
> in_flight_query_2.png, in_flight_query_3.png, very_short_fetch_timer.png
>
>
> For helping users to better understand query execution times, it would be
> helpful to add the following columns on the queries page.
> * First row fetched time - Time taken for the client to fetch the first row
> * Client fetch wait time - Time taken for the client to fetch all rows
> Additional details -
> https://jira.cloudera.com/browse/DWX-18295
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