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Maximum message length (MAXMSGL)

 

Specifies the maximum length of a message that can be transmitted on the channel.

On WebSphere MQ for iSeries, UNIX systems, and Windows systems, specify a value greater than or equal to zero, and less than or equal to the maximum message length for the queue manager. See the MAXMSGL parameter of the ALTER QMGR command in the WebSphere MQ Script (MQSC) Command Reference book for more information. On WebSphere MQ for z/OS, specify a value greater than or equal to zero, and less than or equal to 104 857 600 bytes.

Because various implementations of WebSphere MQ systems exist on different platforms, the size available for message processing may be limited in some applications. This number must reflect a size that your system can handle without stress. When a channel starts up, the lower of the two numbers at each end of the channel is taken.

  1. If splitting of messages is not supported at either end of a channel, the maximum message size cannot be greater than the negotiated maximum transmission size.

  2. The IBM WebSphere MQ products that this edition of the book applies to all support message splitting. Other WebSphere MQ products do not support message splitting.

  3. For a comparison of the functions available, including the different maximum message lengths available see the WebSphere MQ Application Programming Guide.

  4. We can use a maximum message size of 0 which will be taken to mean that the size is to be set to the local queue manager maximum value.

This attribute is valid for all channel types.

 

Parent topic:

Channel attributes in alphabetical order


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