[LUCENE-8018] FieldInfos retains garbage if non-sparse

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 6.5
• Fix Version/s: 7.2, 8.0
• Component/s: core/store
• Labels: easyfix performance

Environment

Lucene 6.5.0, java 8

openjdk version "1.8.0_45-internal"
OpenJDK Runtime Environment (build 1.8.0_45-internal-b14)
OpenJDK 64-Bit Server VM (build 25.45-b02, mixed mode)

• Lucene Fields: New
• Assignee: Adrien Grand
• Reporter: Julian Vassev
• Created: 26/Oct/17 14:32
• Updated: 28/Aug/22 15:20
• Resolved: 27/Oct/17 06:38

Description

A heap dump revealed a lot of TreeMap.Entry instances (millions of them) for a system with about ~1000 active searchers.