Dan Hecht has posted comments on this change. Change subject: IMPALA-3823: Add timer to measure Parquet footer reads ......................................................................
Patch Set 5: (1 comment) http://gerrit.cloudera.org:8080/#/c/3576/5/be/src/exec/hdfs-parquet-scanner.cc File be/src/exec/hdfs-parquet-scanner.cc: Line 1891: process_footer_avg_timer_->UpdateCounter(&single_footer_process_timer); Looking in AveragedCounter::UpdateCounter(), there's a couple of things that look concerning: 1) That method maintains a map from Counter* -> int, where the pointer is this argument. But this argument is a stack parameter, so this doesn't seem like it will work like intended. 2) See the comment about synchronizing that map (appears to be the callers responsibility). -- To view, visit http://gerrit.cloudera.org:8080/3576 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: Icf87bad90037dd0cea63b10c537382ec0f980cbf Gerrit-PatchSet: 5 Gerrit-Project: Impala Gerrit-Branch: cdh5-trunk Gerrit-Owner: Sailesh Mukil <[email protected]> Gerrit-Reviewer: Dan Hecht <[email protected]> Gerrit-Reviewer: Henry Robinson <[email protected]> Gerrit-Reviewer: Marcel Kornacker <[email protected]> Gerrit-Reviewer: Sailesh Mukil <[email protected]> Gerrit-HasComments: Yes
