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From "Hiram Chirino" <hi...@hiramchirino.com>
Subject Re: performance of message selectors
Date Wed, 02 Aug 2006 17:41:40 GMT
Unfortunately.. right now, I don't think we can do anything to improve
your use case.  If you feel like doing some hacking on ActiveMQ, you
could potentially implement a solution where some selector expressions
are optimized by maintaining indexes.

Regards,
Hiram

On 8/2/06, Jamie McCrindle <jamiemccrindle@gmail.com> wrote:
> hi all,
>
> first off, i realise that my usage pattern cuts against the grain but
> here's the scenario nonetheless:
>
> i have a queue of messages with an "id" message property (not to
> confused with JMSMessageID) and i regularly need to pull a particular
> message (with a particular "id") off of that queue. i do that by
> creating a message consumer that has a selector something like "id =
> '" + someid + "'".
>
> performance is quite poor as the queue gets larger.
>
> in the future, i'll put those messages into a table with an index
> against id but for now i was wondering if there is any tuning i can
> apply to get it to go faster. i've read
> http://devzone.logicblaze.com/site/apache-activemq-performance-tuning-guide.html
> and only setting the prefetch size to 1 seems applicable.
>
> cheers,
> j.
>
> ps. anyone else using message selectors like this?
>


-- 
Regards,
Hiram

Blog: http://hiramchirino.com

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