Dimitris Tsirogiannis has posted comments on this change. Change subject: IMPALA-4029: [DOCS] Include known issue for 'flat buffers' change ......................................................................
Patch Set 1: (3 comments) http://gerrit.cloudera.org:8080/#/c/7236/1/docs/topics/impala_known_issues.xml File docs/topics/impala_known_issues.xml: PS1, Line 572: in memory usage for Impala catalog metadata (table files : and data blocks). By default, the memory overhead is about 5-7%. If the : <codeph>compact_catalog_topic</codeph> flag is used, the memory usage is : more substantial, approximately twice as much as in previous versions. Increase in memory usage is not the correct description. The effect is increase in catalog update topic size (you have the correct numbers) which results in higher CPU and network utilization when the statestore broadcasts catalog update topics to the impalads. PS1, Line 578: High I'd say Medium. PS1, Line 583: A fix is in the pipeline IMPALA-5500 is the jira for this fix. -- To view, visit http://gerrit.cloudera.org:8080/7236 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I65495748984268763b2690c193488a338409e13e Gerrit-PatchSet: 1 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: John Russell <[email protected]> Gerrit-Reviewer: Dimitris Tsirogiannis <[email protected]> Gerrit-Reviewer: Greg Rahn <[email protected]> Gerrit-Reviewer: John Russell <[email protected]> Gerrit-HasComments: Yes
