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From "Andrei Dulceanu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-4579) Improve FileStore.size calculation
Date Wed, 20 Jul 2016 14:25:20 GMT
Andrei Dulceanu created OAK-4579:

             Summary: Improve FileStore.size calculation
                 Key: OAK-4579
                 URL: https://issues.apache.org/jira/browse/OAK-4579
             Project: Jackrabbit Oak
          Issue Type: Task
          Components: segment-tar
            Reporter: Andrei Dulceanu
            Assignee: Andrei Dulceanu
            Priority: Minor
             Fix For: Segment Tar 0.0.6

A new approach for calculating {{FileStore::size}} is needed because this method is prone
to lock contention and should not be called too often.

The steps to implement the approach are:
* reduce the lock surface of the size() method. This should be simple enough by creating a
copy of the readers / writer inside the lock and do the actual size calculation on that snapshot
but outside of the lock.
* lower size() visibility to package to avoid misuse (from monitoring tools)

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