Rajesh Balamohan created TEZ-4210: ------------------------------------- Summary: Use task counter information to compute keycount during hashtable loading Key: TEZ-4210 URL: https://issues.apache.org/jira/browse/TEZ-4210 Project: Apache Tez Issue Type: Bug Reporter: Rajesh Balamohan
There are cases when compiler misestimates key count and this results in a number of hashtable resizes during runtime. [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/fast/VectorMapJoinFastHashTableLoader.java#L128] In such cases, it would be good to get "approximate_input_records" (TEZ-4207) counter from upstream to compute the key count more accurately at runtime. -- This message was sent by Atlassian Jira (v8.3.4#803005)