If client sends 1 GB ByteMessage then client needs 4 GB of heap memory to send it. Such high memory demands are not optimal are hardly foreseen by developers or admins.

Memory demands should be reduced.

Workaround is to use Artemis core functionality to send huge message as described in [1]. This workaround is not optimal as it's not portable.

[1] https://github.com/apache/activemq-artemis/blob/master/docs/user-manual/en/large-messages.md#streaming-over-jms