[jboss-user] [JBoss Messaging] - Re: Behavior with selector and fullSize cache

[gaohoward]

Hi,

Using fullSize you can limit the max number of messages in memory of a queue. If the queue's messages (not delivered) reaches fullSize, any more messages that are routed to the queue will be 'paged' to DB. As messages in memory are delivered, more messages are 'fetched' from the DB into memory for delivery.

So if you have 120 messages in queue while the fullSize is 100, 20 messages will be paged to DB.

You also need to notice that once Bridge X is deployed, it will always create a consumer X even the target X is not reachable for the moment. 

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