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From Keith W <keith.w...@gmail.com>
Subject Re: Java Broker performance
Date Tue, 16 Jan 2018 14:44:10 GMT
Hi Tomas,

The work for QPID-8032 is done on master.   If you could repeat your
test-case with Broker-J compiled for master and let us know how
performance changes (improves, hopefully a lot).  Once I have heard
back from you I'll look to have this included in a 7.0.1 very soon.

Kind regards, Keith Wall.

On 26 November 2017 at 14:54, Keith W <keith.wall@gmail.com> wrote:
> Hi Tomas
>
> Thanks for the attachments.
>
> With your Broadcaster code, which sends persistent messages
> asynchronously, I do see inferior performance from Broker J than the
> CPP Broker.  I am using proton master (fa80534)
>
> Currently for this use-case, Broker-J commits synchronously after each
> delivery (see StandardReceivingLinkEndpoint#receiveDelivery.  The
> pertinent part is its use of an AutoCommitTransaction and the fact
> that AutoCommitTransaction#enqueue uses a synchronous #commitTran) and
> this will explain some (if not all) of the performance difference.  As
> Rob mentioned on the 10th November in this thread, the older protocols
> already have an optimisation for this use-case (involving
> AsyncAutoCommitTransaction) which should improve performance on the
> AMQP 1.0 path.   This was raised as QPID-8032. I try and include this
> in a 7.0.1 soon.
>
> This doesn't explain your observation about performance when using
> Qpid JMS Client which is doing a synchronous send of persistent
> messages, but as I commented above, I cannot reproduce the problem: I
> see very similar performance for Broker-J and CPP on my hardware.
>
> cheers Keith.
>
> On 24 November 2017 at 13:06, Tomas Soltys <tomas.soltys@gmail.com> wrote:
>> Hi Keith,
>>
>> Please find attached  cpp_vs_java.gz
>> <http://qpid.2158936.n2.nabble.com/file/t365522/cpp_vs_java.gz>  . This
>> archive contains:
>> * *java* - setup of Java broker (v7.0.0)
>> * *cpp* - setup of C++ broker (v1.36.0)
>> * *proton-client* - C++client based on Qpid proton (v0.18.1)
>> * *java_trace.log* - trace log from client sending 20 messages (10240 Bytes
>> each) to Java broker
>> * *java_trace.log* - trace log from client sending 20 messages (10240 Bytes
>> each) to C++ broker
>>
>> One thing I've noticed in logs is that C++ broker is sending dispositions in
>> chunks of 5 whereas Java broker does this for each message separately.
>>
>> Best regards,
>> Tomas
>>
>>
>>
>> --
>> Sent from: http://qpid.2158936.n2.nabble.com/Apache-Qpid-users-f2158936.html
>>
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