Gopal V created HIVE-17994: ------------------------------ Summary: Vectorization: Serialization bottlenecked on irrelevant hashmap lookup Key: HIVE-17994 URL: https://issues.apache.org/jira/browse/HIVE-17994 Project: Hive Issue Type: Bug Reporter: Gopal V
On machines with slower NUMA, the hashmap lookup for TypeInfo::getPrimitiveCategory is the slowest part of the vectorized serialization loops. The static object references run hot with the NUMA access speeds penalizing half the threads. !vec-serialize-hashmap.png! -- This message was sent by Atlassian JIRA (v6.4.14#64029)