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Subject: Re: Slow and fast messages
From: Jason Whaley <jasonwhaley@gmail.com>
In-Reply-To: <1310424910948-3661071.post@n4.nabble.com>
Date: Thu, 14 Jul 2011 06:20:29 -0600
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Message-Id: <11BB63E1-8816-4856-B727-90B2741F5691@gmail.com>
References: <1310406621311-3660295.post@n4.nabble.com>
 <1310424910948-3661071.post@n4.nabble.com>
To: users@activemq.apache.org

Two questions/suggestions regarding your AMQ setup:

1) What is the average size (or range of sizes) of the actual message =
being sent from your producer?  If you are dealing with larger messages =
you may wish to consider sending Blob Messages instead of putting the =
entire payload inside of the message itself - see =
http://activemq.apache.org/blob-messages.html for more detail.  =
Determining what a "large" message is may vary, but once you start =
approaching 1MB you should definitely consider Blob Messages.

2) What is the network latency between your producer and your broker?  =
If it is substantial enough to affect the speed at which you can produce =
a message and receive acknowledgement from the broker, you could use a =
Network of Brokers between your producer and consumer such that one AMQ =
instance lives on the same host or at least on the same subnet as your =
producer and that instance is responsible for forwarding messages to =
another AMQ instance that your consumer consumes from.  See =
http://activemq.apache.org/networks-of-brokers.html for more.

On Jul 11, 2011, at 4:55 PM, MaryAuaun wrote:

> Boy, this forum is great for making me get my thoughts together and =
answering
> my own questions, but if anyone knows any more, please chime in!
>=20
> For writing 1000 messages
>=20
> Originally 1000 messages took 40 seconds.
>=20
> Persistent vs. Non-Persistent didn't make much difference in speed
>=20
> These settings made a little differenceoptions:
>                connectionFactory.setUseAsyncSend(true); // tbw to test
> speed
>                connectionFactory.setAlwaysSyncSend(false);
>                connectionFactory.setSendAcksAsync(true);
>                connectionFactory.setProducerWindowSize(100);
>      (some of these settings are poorly document or not documented at =
all!)
>  Now 1000 messages takes 27 seconds!=20
>=20
> I removed the "transacted" and commits, that made it much faster
>   1000 messages take about 6 seconds, even with Persistent on.
>=20
> That's nos 166 messages / sec, which is not bad.  If there are other
> improvements I can make, please let me know!
>=20
>=20
> --
> View this message in context: =
http://activemq.2283324.n4.nabble.com/Slow-and-fast-messages-tp3660295p366=
1071.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.