[ https://issues.apache.org/jira/browse/TEZ-2731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gopal V updated TEZ-2731: ------------------------- Issue Type: Sub-task (was: Improvement) Parent: TEZ-2605 > Fix Tez GenericCounter performance bottleneck > --------------------------------------------- > > Key: TEZ-2731 > URL: https://issues.apache.org/jira/browse/TEZ-2731 > Project: Apache Tez > Issue Type: Sub-task > Reporter: Gopal V > Attachments: lock-inc.png, mr-reader-next.png > > > GenericCounter::increment(1) shows up as a ~16% performance penalty inside > the unvectorized codepath of Hive queries. > The vectorized codepath amortizes this entirely by running through that > exactly once every 1024 rows & the performance improvement is dramatic. > !lock-inc.png! > !mr-reader-next.png! > Optimize the GenericCounter impl for mostly uncontested atomic operations. -- This message was sent by Atlassian JIRA (v6.3.4#6332)