&quot;clebert.suconic(a)jboss.com&quot; wrote : I have added some size controlling per Address on the PostOffice. | | Whenever a message is routed, I'm adding the getEncodeSize() of the message to the PostOffice, and when the message is develiered I'm subtracting the queue size on the PostOffice. | You should do the subtraction when the message is completely *acknowledged* (i.e. acked by all references) not when *delivered*. When it's delivered it's still in memory (the deliveries list in the session). anonymous wrote : | To perform the "when the message is delivered" control, | You mean "when the message is acked" :) anonymous wrote : | I am adding the reference counting logic. When the counter==0 on the ACK of the message, I'm calling a method on the postOffice informing that the message was delivered and that method is subtracting the encode size of the address. If the size < watermark I start a depage thread. | This is done on a separate thread? ServerMessage already does reference counting - but only for durable messages. Instead of adding new methods you could just extend what is already there. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4171320#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...