Paul Rogers created DRILL-5123:
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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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