Hi, here is what JBM doc says | 9.3.11. MaxBatchSize | This attribute specifies the maximum number of messages to consume from the source destination before sending | them in a batch to the target destination. It's value must >= 1 | | 9.3.12. MaxBatchTime | This attribute specifies the maximum number of milliseconds to wait before sending a batch to target, even if the | number of messages consumed has not reached MaxBatchSize. It's value must can be -1 to represent 'wait forever', | or >=1 to specify an actual time. | | Please note the unit of MaxBatchTime value is milliseconds. I think give it 1 is too small. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4241467#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...