21.2.2. Using JMS

If JNDI is used to look up the connection factory, the minimum large message size is specified in JBOSS_DIST/jboss-as/server/<PROFILE>/deploy/hornetq/hornetq-jms.xml.
...
<connection-factory name="NettyConnectionFactory">
   <connectors>
     <connector-ref connector-name="netty"/>
   </connectors>
   <entries>
      <entry name="/ConnectionFactory"/>
      <entry name="/XAConnectionFactory"/>
   </entries>
   <min-large-message-size>250000</min-large-message-size>
</connection-factory>
...
If the connection factory is being instantiated directly, the minimum large message size is specified by HornetQConnectionFactory.setMinLargeMessageSize.