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https://issues.apache.org/jira/browse/OAK-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13778761#comment-13778761
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Marcel Reutegger commented on OAK-1041:
---------------------------------------

This is actually only a problem with Java 6. With Java 7 (at least the Oracle 
JVM) {{String.substring()}} actually copies the contents of the char array into 
a new one.
                
> Inaccurate size estimate in EmpiricalWeigher
> --------------------------------------------
>
>                 Key: OAK-1041
>                 URL: https://issues.apache.org/jira/browse/OAK-1041
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>          Components: core, mongomk
>    Affects Versions: 0.9
>            Reporter: Marcel Reutegger
>            Assignee: Marcel Reutegger
>            Priority: Minor
>             Fix For: 0.10
>
>
> Similar to OAK-1038, also the EmpiricalWeigher calculates values, which are 
> slightly too low and may lead to OOME. E.g. see OAK-1034.

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