[HIVE-17304] ThreadMXBean based memory allocation monitory for hash table loader

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0
• Target Version/s: 3.0.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 11/Aug/17 23:30
• Updated: 20/Oct/17 23:06

Description

Hash table memory monitoring is based on java data model which can be unreliable because of various reasons (wrong object size estimation, adding new variables to any class without accounting its size for memory monitoring, etc.). We can use allocation size per thread that is provided by ThreadMXBean and fallback to DataModel in case if JDK doesn't support thread based allocations.

Issue Links

• links to: RB