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https://issues.apache.org/jira/browse/OAK-9180?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17179688#comment-17179688
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Andrei Dulceanu commented on OAK-9180:
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[~smiroslav], how about renaming the two methods previously responsible with 
locking/unlocking with something more relevant to their current purpose?

> Optimise synchronisation between threads when writing to 3rd level segment 
> cache 
> ---------------------------------------------------------------------------------
>
>                 Key: OAK-9180
>                 URL: https://issues.apache.org/jira/browse/OAK-9180
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>            Reporter: Miroslav Smiljanic
>            Assignee: Andrei Dulceanu
>            Priority: Minor
>         Attachments: OAK-9180.patch
>
>
> Currently threads that are updating 3rd level segment cache, are obtaining 
> lock  on the instance of HashMap, before inserting segmentId. 
> This can be optimised by using Set, obtained from 
> ConcurrentHashMap.newKeySet(). 



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