Michael Dürig updated OAK-4732:
    Fix Version/s:     (was: Segment Tar 0.0.16)
                   Segment Tar 0.0.18

> (Slightly) prioritise reads over writes 
> ----------------------------------------
>                 Key: OAK-4732
>                 URL: https://issues.apache.org/jira/browse/OAK-4732
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: Performance
>             Fix For: Segment Tar 0.0.18
> When fetching the current root from the {{SegmentNodeStore}} an older 
> revision will be returned when a commit is being processed concurrently. I 
> think it would make sense to wait for a short time in this case increasing 
> the chance of returning an up to date state. The idea is that this would 
> lower the rebasing work that need to be done later on should the returned 
> root be used for further modifications. 
> An interesting value for the wait time is to use  the median (or more general 
> a percentile) of the commit time of the last say 1000 commits. This would 
> mean that (for the median) we have a 50% chance of getting up to date date. 
> For a 90% percentile we would have longer wait times but then a 90% chance of 
> getting up to date date. 

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