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https://issues.apache.org/jira/browse/QPID-3610?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148525#comment-13148525
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Robbie Gemmell commented on QPID-3610:
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Seems reasonable, I will take a look over the weekend and see where I can slot
something in about it.
> set TCP_NODELAY true by default in the Java client to improve general
> performance
> ---------------------------------------------------------------------------------
>
> Key: QPID-3610
> URL: https://issues.apache.org/jira/browse/QPID-3610
> Project: Qpid
> Issue Type: Improvement
> Components: Java Client
> Affects Versions: 0.14
> Reporter: Robbie Gemmell
> Assignee: Robbie Gemmell
> Fix For: 0.15
>
>
> set TCP_NODELAY true by default in the Java client to improve general
> performance.
> TCP_NODELAY is currently set false by default. This leads to synchronous
> commands such as ExecutionSync or TxCommit taking a potentially very long
> amount of time (~30-40ms observed), which cripples transactional performance,
> causes consumer creation to take a long time, and generally impedes
> performance of messaging patterns such as request-response.
> Whilst this change could perhaps cause some falloff in out-the-box peak
> throughput in situations such as NoAck mode, the observed performance
> increases in a variety of other situations such as the above is too large
> (anything from 10% to 1000%, yes 10x throughput, has been observed in select
> tests) to ignore for our general out-the-box configuration. Users interested
> in the ultimate throughput will be the ones most likely to tune for it, so we
> should set default configuration to cater for those who arent/dont.
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