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From "Jonas Lim" <>
Subject Re: Flow control
Date Wed, 03 May 2006 05:44:52 GMT

 ActiveMQ has a flow control mechanism that will stop a producer from 
posting messages when this memory limit  is reached (ie. slow consumer) and 
will allow posting again once messages are taken out from memory .  By 
default, Activemq set the memory limit of the broker to 20MB.

If you want to increase this limit, add the ff. on the config file of your 

<usageManager limit="1000000000"/> <!-- size in bytes -->

btw, this should only be applicable  when using non-durable queues as 
durable queues will just keep on sending messages and fill up the queue 
until you run out of disk space


----- Original Message ----- 
From: "kj1003" <>
To: <>
Sent: Tuesday, May 02, 2006 11:38 PM
Subject: Flow control

> Hi,
> Does Active MQ implements any flow control mechanism in case of slow
> consumers?
> Thanks.
> --
> View this message in context: 
> Sent from the ActiveMQ - User forum at 

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