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From "Robbie Gemmell (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-3610) set TCP_NODELAY true by default in the Java client to improve general performance
Date Fri, 11 Nov 2011 10:06:51 GMT
set TCP_NODELAY true by default in the Java client to improve general performance
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                 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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