[OAK-6718] Configure RAM buffer size used by IndexWriter with oak-run indexing

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.7.9, 1.8.0
• Component/s: lucene, run
• Epic Link: Index Tooling 1.8
• Assignee: Chetan Mehrotra
• Reporter: Chetan Mehrotra
• Created: 26/Sep/17 10:40
• Updated: 13/Oct/17 08:59
• Resolved: 27/Sep/17 07:44

Description

Lucene IndexWriter uses 16M buffer by default. For reindexing of large repo via oak-run it should be possible to set this to higher value like 300MB.

In one of the test which indexes 65M entries setting the buffer size to 300M reduced the reindexing time from 2 hrs to 1.1 hrs

Issue Links

• relates to: OAK-6710 CommitMitigated merge policy should not reduce performance significantly