[OAK-3501] PersistedCompactionMap could release reference to records early

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.3.8, 1.4
• Component/s: segmentmk
• Labels: compaction gc
• Epic Link: SegmentMK revision GC
• Assignee: Alex Deparvu
• Reporter: Alex Deparvu
• Created: 09/Oct/15 08:42
• Updated: 16/Feb/21 09:53
• Resolved: 12/Oct/15 09:00

Description

Whenever a PersistedCompactionMap becomes empty it will be eventually dropped from the compaction maps chain. this will happen on the next compaction cycle, which happens post-cleanup. so we're potentially keeping a reference to some collectable garbage for up to 2 cycles.
I'd like to propose a patch that allows for eagerly nullifying the reference to the records, making this interval shorter.

Issue Links

• breaks: OAK-3511 Test failure: CompactionMapTest.removeSome