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Sorabh Hamirwasia updated DRILL-6503: ------------------------------------- Reviewer: Parth Chandra > Performance improvements in lateral > ----------------------------------- > > Key: DRILL-6503 > URL: https://issues.apache.org/jira/browse/DRILL-6503 > Project: Apache Drill > Issue Type: Improvement > Components: Execution - Relational Operators > Affects Versions: 1.14.0 > Reporter: Sorabh Hamirwasia > Assignee: Sorabh Hamirwasia > Priority: Major > Fix For: 1.14.0 > > > In LateralJoin currently the copying of data from left and right inputs is > not very efficient. Basically for the number of rows seen in right side (let > say n), it does copy row by row across all vectors in left and right inputs. > Whereas if it copies each vectors (n times) and then move to next vector that > can help in improving the performance. > Also today MemoryManager::update can be called in lateral multiple times for > left and right incoming. These calls are found to be very expensive hence > make sure it's called only once for every new incoming from both left and > right. -- This message was sent by Atlassian JIRA (v7.6.3#76005)