[LUCENE-651] Poor performance race condition in FieldCacheImpl

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Component/s: core/search
• Lucene Fields: Patch Available
• Assignee: Otis Gospodnetic
• Reporter: Oliver Hutchison
• Created: 14/Aug/06 01:30
• Updated: 28/Aug/22 11:30
• Resolved: 20/Nov/06 07:11

Description

A race condition exists in FieldCacheImpl that causes a significant performance degradation if multiple threads concurrently request a value that is not yet cached. The degradation is particularly noticable in large indexes and when there a many concurent requests for the cached value.

For the full discussion see the mailing list thread 'Poor performance "race condition" in FieldSortedHitQueue' (http://www.gossamer-threads.com/lists/lucene/java-user/38717).