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https://issues.apache.org/jira/browse/OAK-7795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella updated OAK-7795:
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Fix Version/s: 1.10
Adding 1.10 version before 1.10.0 release
> Log a debug message when two or more indices have same or very close cost
> amounts
> ---------------------------------------------------------------------------------
>
> Key: OAK-7795
> URL: https://issues.apache.org/jira/browse/OAK-7795
> Project: Jackrabbit Oak
> Issue Type: Task
> Components: query
> Reporter: Tommaso Teofili
> Assignee: Tommaso Teofili
> Priority: Major
> Fix For: 1.10, 1.9.10
>
> Attachments: OAK-7795.0.patch, OAK-7795.1.patch
>
>
> The index selection mechanism in {{QueryImpl}} may lead to the wrong index to
> be picked up in case different indexes return same (or very close) costs.
> As a remedy we can set cost overrides, change queries or index definitions.
> However to speed up identification of such problematics situations it'd be
> good to have a line in the (debug) logs reporting when for a particular query
> a number of indexes have same or very close costs (in the order of 10^-1).
> This would give a first pointer to such possible problematic situations to be
> inspected.
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