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https://issues.apache.org/jira/browse/OAK-1903?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger closed OAK-1903.
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> PropertyIndex applies 10x penalty to is not null queries even when the node
> count is known
> ------------------------------------------------------------------------------------------
>
> Key: OAK-1903
> URL: https://issues.apache.org/jira/browse/OAK-1903
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: query
> Affects Versions: 1.0, 1.0.1
> Reporter: Justin Edelson
> Assignee: Thomas Mueller
> Fix For: 1.0.2
>
> Attachments: OAK-1903.patch
>
>
> ContentMirrorStoreStrategy has a bit of code which multiples the cost of a
> "is not null" query by 10. This code was added in r1501746, but there's
> nothing in the related JIRA (OAK-894) which mentions this change.
> It appears to me that this multiplier should only take effect *if* the
> maximum node count has been reached. Otherwise, this code vastly overstates
> the cost of a query.
> In a recent test, a property on 45 nodes generated a cost of 452.
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