Tim Armstrong has posted comments on this change. ( http://gerrit.cloudera.org:8080/9017 )
Change subject: IMPALA-6388: Fix the Union node number of hosts estimation ...................................................................... Patch Set 4: Anuj asked me to look at the test failure. The query failure is an expected consequence of the plan change. The num_nodes estimate was higher, which made the memory estimate per node lower, which resulted in the planner choosing a lower buffer size. Before this change the query was processing rows > max_row_size so there was no guarantee that it would work. -- To view, visit http://gerrit.cloudera.org:8080/9017 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I51e1ecca8dbc84b2b5a72708667b2799d00279f0 Gerrit-Change-Number: 9017 Gerrit-PatchSet: 4 Gerrit-Owner: Taras Bobrovytsky <[email protected]> Gerrit-Reviewer: Alex Behm <[email protected]> Gerrit-Reviewer: Impala Public Jenkins Gerrit-Reviewer: Philip Zeyliger <[email protected]> Gerrit-Reviewer: Taras Bobrovytsky <[email protected]> Gerrit-Reviewer: Tim Armstrong <[email protected]> Gerrit-Comment-Date: Tue, 16 Jan 2018 16:27:42 +0000 Gerrit-HasComments: No
