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From "Paul Rogers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5123) Write query profile after sending final response to client to improve latency
Date Sat, 10 Dec 2016 23:17:58 GMT
Paul Rogers created DRILL-5123:
----------------------------------

             Summary: Write query profile after sending final response to client to improve
latency
                 Key: DRILL-5123
                 URL: https://issues.apache.org/jira/browse/DRILL-5123
             Project: Apache Drill
          Issue Type: Improvement
    Affects Versions: 1.8.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
            Priority: Minor


In testing a particular query, I used a test setup that does not write to the "persistent
store", causing query profiles to not be saved. I then changed the config to save them (to
local disk). This produced about a 200ms difference in query run time as perceived by the
client.

I then moved writing the query profile _after_ sending the client the final message. This
resulted in an approximately 100ms savings, as perceived by the client, in query run time
on short (~3 sec.) queries.



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