A new property was added to support messaging performance. The message size limitation can be changed by modifying an internal Unwired Server property, sup.msg.max_content_size. If you feel the 20KB value should be changed, work with your Sybase representative.
The current message size limit for Unwired Server is 20KB. In general, enlarging the message size results in a lower number of messages, and higher efficiency.
Performance also depends on the device environment. A message that is too large stresses the device, and negates efficiency. Device factors include memory and size of the object graph being sent. In some cases, a larger message size terminates message processing. When the Unwired Server message size exceeds the limit, the message is immediately sent to the client side.