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https://issues.apache.org/jira/browse/OAK-2679?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906421#comment-14906421
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Thomas Mueller commented on OAK-2679:
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I will change the minimum costs per index type slightly:
* 0.0 for uuid
* 0.0 for traversal
* 1.0 for reference
* 2.0 for property
* 2.0 for nodetype
* 2.1 for lucene property
* 2.2 for lucene (old)
* 2.3 for solr
* 3.0 for ordered (deprecated)
> Query engine: cache execution plans
> -----------------------------------
>
> Key: OAK-2679
> URL: https://issues.apache.org/jira/browse/OAK-2679
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, query
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Labels: performance
> Fix For: 1.3.7
>
> Attachments: 0001-OAK-2679-Reduce-execution-plan-overhead_0.2.patch,
> OAK-2679.patch, executionplancache.patch
>
>
> If there are many indexes, preparing a query can take a long time, in
> relation to executing the query.
> The query execution plans can be cached. The cache should be invalidated if
> there are new indexes, or indexes are changed; a simple solution might be to
> use a timeout, and / or a manual cache clean via JMX or so.
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