[ https://issues.apache.org/jira/browse/IMPALA-9378?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong updated IMPALA-9378: ---------------------------------- Labels: multithreading performance (was: ) > CPU usage for runtime profiles with multithreading > -------------------------------------------------- > > Key: IMPALA-9378 > URL: https://issues.apache.org/jira/browse/IMPALA-9378 > Project: IMPALA > Issue Type: Improvement > Components: Backend > Reporter: Tim Armstrong > Assignee: Tim Armstrong > Priority: Major > Labels: multithreading, performance > Attachments: coord_q5_dop0.svg, coord_q5_dop16.svg > > > [~drorke] reports that significant amounts of time can be spent on the > runtime profile with higher values of mt_dop. This can impact query > performance from the client's point of view since profile serialisation is on > the critical path for closing the query. Also serialising the profile for the > webserver holds the ClientRequestState's lock, so can block query progress. > We should figure out how to make this more efficient. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org