Remote EJB performance is very poor

Issue

• Remove EJB calls are having very poor performance
• One of our development team has issues with the performance with remote EJBs. When they pass messages, only 8KB is send each time, and for a 64KB messages, they need 8 messages. With 30ms ping, this spend a lot of time waiting ACKs and sending following message. Is there a way to increment the 8KB to a larger value? For example 64, 128....