AEM 6.1 How to enable Lucene index configuration

Recommendation
Open /system/console/configMgr/org.apache.jackrabbit.oak.plugins.index.lucene.LuceneIndexProviderService and

Enable CopyOnRead
Enable CopyOnWrite
Enable Prefetch Index Files

See http://jackrabbit.apache.org/oak/docs/query/lucene.html for more information about the available parameters

As some paths don't need to be indexed, do the following: with CRXDE Lite,
go to /oak:index/lucene, set a multivalue string property (String[]) named “excludedPaths" with these values /var, /etc/workflow/instances, /etc/replication.

Lucene Index Configuration related findings

Finding ID	Title	Total Risk	Effort to fix
JVM1	enable CopyOnRead	Medium	Low
JVM2	enable CopyOnWrite	Medium	Low
JVM3	Dupdate.limit	Medium	Low
JVM4	enable Prefetch Index Files	Medium	Low