.. or when the PendingMessageLimitStrategy is applied messages may be dropped 
based on desired message pattern.

> On May 21, 2024, at 10:40 AM, Jean-Baptiste Onofré <j...@nanthrax.net> wrote:
> 
> Hi,
> 
> If you don't have any subscribers on the topic, the message is directly 
> removed.
> 
> If you have subscribers or durable subscribers, the message is removed
> when all subscribers send the ack.
> 
> Regards
> JB
> 
> On Thu, May 16, 2024 at 5:10 PM William Crowell
> <wcrow...@perforce.com.invalid> wrote:
>> 
>> Hi,
>> 
>> When is a message dropped from memory on a topic?  When it is acknowledged?
>> 
>> I have 10 topics that I noticed that are occupying a large amount of heap 
>> from Eclipse’s Memory Analysis Tool.  I am not seeing any evidence of a 
>> memory leak, but we have configured a paging policy for each one of these 
>> topics to combat the issue.
>> 
>> I noticed there is a messagesAcknowledged and messagesAcknowledged fields on 
>> org.apache.activemq.artemis.core.server.impl.QueueImpl.  messagesAcknowledge 
>> is usually zero on these queues which take a lot of heap.
>> 
>> Regards,
>> 
>> William Crowell
>> 
>> 
>> 
>> 
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