[HIVE-20560] Set hive.llap.memory.oversubscription.max.executors.per.query to be 1/3rd of num of executors per node

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-1
• Component/s: Hive
• Assignee: Miklos Gergely
• Reporter: Miklos Gergely
• Created: 14/Sep/18 11:32
• Updated: 17/Nov/22 08:54
• Resolved: 17/Sep/18 23:18

Description

Unless hive.llap.memory.oversubscription.max.executors.per.query is not specified by the user,
it should be calculated like this:

hive.llap.memory.oversubscription.max.executors.per.query = min(max(1, int(hive.llap.daemon.num.executors / 3)),8)

In container mode it remains 3 (unless specified otherwise).