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https://issues.apache.org/jira/browse/BOOKKEEPER-157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13197716#comment-13197716
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Ivan Kelly commented on BOOKKEEPER-157:
---------------------------------------
{quote}
Just so that I make sure I understand, the discussion about netty is to justify
the solution of the patch, right?
{quote}
Yes, it's purely informational.
{quote}
This patch seems to enables us to increase the number of threads, but it
doesn't actually increase it or allow an application to increase it through
configuration. Is this intentional?
{quote}
I didn't touch the number of threads which are actually created, I just removed
the bottleneck which occurs when writing to a single ledger, that only one of
the worker threads is used.
I'll add a comment to the synchronisation now.
> For small packets, increasing number of bookies actually degrades performance.
> ------------------------------------------------------------------------------
>
> Key: BOOKKEEPER-157
> URL: https://issues.apache.org/jira/browse/BOOKKEEPER-157
> Project: Bookkeeper
> Issue Type: Bug
> Reporter: Ivan Kelly
> Assignee: Ivan Kelly
> Fix For: 4.1.0
>
> Attachments: BOOKKEEPER-157.diff, run1.pdf, varySize.pdf
>
>
> When benchmarking with packets smaller than 1k, performance will degrade when
> the ensemble contains more than 3 bookies. See attached diagram.
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