[CASSANDRA-9929] More efficient memory handling for tiny off-heap cache entries

• Type: Improvement
• Status: Open
• Priority: Low
• Resolution: Unresolved
• Fix Version/s: 5.x
• Component/s: Legacy/Core
• Assignee: Robert Stupp
• Reporter: Robert Stupp

Authors

Robert Stupp

• Created: 29/Jul/15 20:26
• Updated: 07/Mar/23 10:54

Description

CASSANDRA-9739 usually have tiny cache entries. The overhead of any general-purpose memory allocator is probably too high.

benedict proposed a chunked allocation strategy for OHC that allows to allocate the whole memory up-front - thus reducing the malloc/free overhead to 0.

(EDIT: Key cache does not have tiny cache entries - at least not now)

Issue Links

• is blocked by: CASSANDRA-9739 Migrate counter-cache to be fully off-heap