[CASSANDRA-7883] Allow plugging JEMalloc for off-heap memtables

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 2.2.0 beta 1
• Labels: patch
• Assignee: Jay Patel
• Reporter: Jay Patel

Authors

Jay Patel

Reviewers

Benedict Elliott Smith

• Tester: Benedict Elliott Smith
• Created: 05/Sep/14 08:20
• Updated: 16/Apr/19 09:31
• Resolved: 08/Sep/14 03:55

Description

Off-heap memtables (memtable_allocation_type:offheap_objects) introduced by CASSANDRA-6694 uses native GCC allocator. Provide an option to use JEMalloc allocator (http://www.canonware.com/jemalloc/) which is good to reduce fragmentation.

CASSANDRA-3997 adds below option for off-heap caches and metadata. But it's not in effect for off-heap memtables. Should we use the same option or add another?

memory_allocator: JEMallocAllocator