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The MaxMsgLength queue manager attribute in the IBM WebSphere MQ software defines the maximum length of a message that can be handled by a queue manager. The MaxMsgLength queue attribute is the maximum length of a message that can be handled by a queue.
The default maximum message length on IBM WebSphere MQ is 4 MB. If the message is too large for the queue, MQRC_MSG_TOO_BIG_FOR_Q is returned. Similarly, if the message is too large for the queue manager, MQRC_MSG_TOO_BIG_FOR_Q_MGR is returned.
If you are handling large messages, you can change the MaxMsgLength queue manager and queue attributes independently. You can set the queue manager attribute value between 32768 bytes and 100 MB; you can set the queue attribute value between 0 and 100 MB.
After changing one or both of the MaxMsgLength attributes, restart your applications and channels to ensure that the changes take effect. For more information, consult the IBM WebSphere MQ documentation at:
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