John Russell has posted comments on this change. Change subject: Release note updates for Impala 2.8 ......................................................................
Patch Set 5: (9 comments) Annotated with suggestions from Mostafa. http://gerrit.cloudera.org:8080/#/c/5668/5/docs/topics/impala_new_features.xml File docs/topics/impala_new_features.xml: PS5, Line 59: <!-- To do: Get together with Mostafa to enumerate other performance-related improvements. --> Talked with Mostafa. Subsequent comments from me are based on our chat. PS5, Line 65: <p rev="IMPALA-4572"> : The <codeph>COMPUTE STATS</codeph> statement can : take advantage of multithreading. : </p> Fold this item into the longer one below on the MT_DOP option. PS5, Line 79: native code generation Group all the codegen-related items together. (Except the filtering one, which combines codegen + other improvements.) PS5, Line 95: large number : of columns Especially if the table has TIMESTAMP columns. PS5, Line 112: A new hint, <codeph>SORTBY Why does the Fix Version field of IMPALA-4163 say Impala 2.9 not 2.8? Verify this hint is supposed to be included and documented. PS5, Line 120: new configuration setting Explain how to use this (requires safety valve). I'll defer that suggestion until a subsequent doc review. Probably will involve touching impala_scalability.xml. PS5, Line 121: network overhead The improvement is mainly reduced load on the catalog server. PS5, Line 140: </li> Mention IMPALA-4302 i.e. better IN list scalability. PS5, Line 141: <li> Mention IMPALA-1286 i.e. extracting common conjuncts from disjunctions. -- To view, visit http://gerrit.cloudera.org:8080/5668 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I7c47f422e509cec6d3eb8aaa82294b584f393aed Gerrit-PatchSet: 5 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: John Russell <jruss...@cloudera.com> Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com> Gerrit-Reviewer: Ambreen Kazi <ambreen.k...@cloudera.com> Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Dimitris Tsirogiannis <dtsirogian...@cloudera.com> Gerrit-Reviewer: Greg Rahn <gr...@cloudera.com> Gerrit-Reviewer: Henry Robinson <he...@cloudera.com> Gerrit-Reviewer: Jim Apple <jbapple-imp...@apache.org> Gerrit-Reviewer: John Russell <jruss...@cloudera.com> Gerrit-Reviewer: Laurel Hale <lau...@cloudera.com> Gerrit-Reviewer: Matthew Jacobs <m...@cloudera.com> Gerrit-HasComments: Yes
