Hello James,
I understand very well that there are many factors that influence
such tests. In my
setup, I've tried to make the environment for both Queue and Topic
as similar as
possible, not to have the best results possible but to have
results that can be compared.
As far as I know, the default config for Active MQ does not use
JDBC, or does it?
Also, on my tests, it's the Queue that is 40 times slower that the
Topic.
My goal was more to have your opinion on the fact that, using the
same environment,
sending messages to a Queue is *much* slower that sending to a
Topic. Does that make
you thing that I've done something wrong, or is it something that
can be expected?
I am currently checking out the source code of ActiveMQ to run
some tests as
described on your website[1] so I'll see how far my figures are
from your tests.
Thanks for the answer,
Sébastien
[1] http://incubator.apache.org/activemq/jmeter-performance-
tests.html
James Strachan wrote:
> In general, it all depends
>
> http://incubator.apache.org/activemq/how-fast-is-activemq.html
>
> if using JDBC persistence, there is a bit more work required to
store
> a topic message than a queue (since topics need to maintain a
list of
> messages each consumer requires, whereas a queue is logically
> equivalent to a single row insert). Also obviously, if there are
more
> than one consumer, then the broker has more work to do with topics.
>
> But like many things, it all depends on what you are doing, how
you're
> doing it and what your environment is. YMMV
>
>
> On 1/15/07, Sebastien Pennec <[EMAIL PROTECTED]> wrote:
>> Hello,
>>
>> I checked on the list archive, but couldn't find the answer to my
>> current situation,
>> so here I am :)
>>
>> I've launched an ActiveMQ server on my machine, with the default
>> configuration stuff.
>> The only thing I've added is the jndi.properties file that I've
found
>> in the
>> documentation.
>>
>> This jndi config file helps create an example Queue and an example
>> Topic. I can
>> easily connect message producers and consumers to the Queue and
Topic.
>> The server, as
>> well as the two message producers and the two message
consumers, are
>> on my local machine.
>>
>> When I send messages to the Topic, I observe that the time it
takes to
>> send the
>> message is about 0.25 milliseconds. When I send messages to the
Queue,
>> the figure
>> goes up to 10 milliseconds. These figures are the average time
that is
>> observed when
>> sending 10'000 messages.
>> They are modified by the presence or absence of a consumer: it
takes
>> approximately
>> 10% less time when there is no consumer.
>>
>> Is it a normal behavior? I expected the performance between
Topic and
>> Queue to be
>> closer than that.
>>
>> Thanks for your help,
>>
>> Sébastien
>>
>> --
>> Sébastien Pennec
>> [EMAIL PROTECTED]
>>
>> Logback: The reliable, generic, fast and flexible logging
framework
>> for Java.
>> http://logback.qos.ch/
>>
>
>
--
Sébastien Pennec
[EMAIL PROTECTED]
Logback: The reliable, generic, fast and flexible logging
framework for Java.
http://logback.qos.ch/
