[ https://issues.apache.org/jira/browse/IMPALA-6754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong updated IMPALA-6754: ---------------------------------- Labels: observability (was: ) > Exchange node includes FirstBatchArrivalWaitTime in summary > ----------------------------------------------------------- > > Key: IMPALA-6754 > URL: https://issues.apache.org/jira/browse/IMPALA-6754 > Project: IMPALA > Issue Type: Bug > Components: Backend > Affects Versions: Impala 2.11.0 > Reporter: Balazs Jeszenszky > Assignee: Michael Ho > Priority: Minor > Labels: observability > > In the following execution summary: > {code:java} > Operator #Hosts Avg Time Max Time #Rows Est. #Rows Peak Mem > Est. Peak Mem Detail > ----------------------------------------------------------------------------------------------------------------------------------- > 15:AGGREGATE 1 141.556us 141.556us 1 1 20.00 KB > 10.00 MB FINALIZE > 14:EXCHANGE 1 2h46m 2h46m 1 1 0 > 0 UNPARTITIONED > 09:AGGREGATE 1 16s442ms 16s442ms 1 1 768.00 KB > 10.00 MB > 08:HASH JOIN 1 1h38m 1h38m 2.63B -1 122.64 MB > 2.00 GB LEFT OUTER JOIN, BROADCAST > [...] > {code} > the timer for the EXCHANGE node is misleading. It's unlikely that sending a > single row across network took so long, and individual counters confirm: > {code:java} > EXCHANGE_NODE (id=14):(Total: 2h46m, non-child: 2h46m, % non-child: > 100.00%) > - ConvertRowBatchTime: 901.000ns > - PeakMemoryUsage: 0 > - RowsReturned: 1 (1) > - RowsReturnedRate: 0 > DataStreamReceiver: > - BytesReceived: 16.00 B (16) > - DeserializeRowBatchTimer: 4.965us > - FirstBatchArrivalWaitTime: 2h46m > - PeakMemoryUsage: 4.01 KB (4104) > - SendersBlockedTimer: 0.000ns > - SendersBlockedTotalTimer(*): 0.000ns > {code} > In this case, the underlying joins took long (which is correctly reported in > the rest of the profile). > Exchange timers should reflect the time it took to transfer rows across > network. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org