Vuk Ercegovac has posted comments on this change. ( http://gerrit.cloudera.org:8080/11706 )
Change subject: IMPALA-7689: Reduce per column per partition stats estimate size ...................................................................... Patch Set 1: Code-Review+2 (1 comment) looks good. main thing for this one that would be helpful is to explain where the 400 came from (and from there, the 200). http://gerrit.cloudera.org:8080/#/c/11706/1/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java File fe/src/main/java/org/apache/impala/catalog/HdfsTable.java: http://gerrit.cloudera.org:8080/#/c/11706/1/fe/src/main/java/org/apache/impala/catalog/HdfsTable.java@199 PS1, Line 199: 200 the 400 byte estimate was pretty accurate from the examples I saw. is there a pointer you can put here to explain how that was derived, then explain the 50% of that from compression? -- To view, visit http://gerrit.cloudera.org:8080/11706 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: I347b41d9b298d7cd73ec812692172e0511415eee Gerrit-Change-Number: 11706 Gerrit-PatchSet: 1 Gerrit-Owner: Bharath Vissapragada <bhara...@cloudera.com> Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com> Gerrit-Reviewer: Vuk Ercegovac <vercego...@cloudera.com> Gerrit-Comment-Date: Wed, 17 Oct 2018 03:42:53 +0000 Gerrit-HasComments: Yes
