[LUCENE-1574] PooledSegmentReader, pools SegmentReader underlying byte arrays

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 2.4.1
• Fix Version/s: 4.9, 6.0
• Component/s: modules/other
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Jason Rutherglen
• Created: 26/Mar/09 23:38
• Updated: 28/Aug/22 11:58

Description

PooledSegmentReader pools the underlying byte arrays of deleted docs and norms for realtime search. It is designed for use with IndexReader.clone which can create many copies of byte arrays, which are of the same length for a given segment. When pooled they can be reused which could save on memory.

Do we want to benchmark the memory usage comparison of PooledSegmentReader vs GC? Many times GC is enough for these smaller objects.