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How to Demonstrate Message Fragmentation and Defragmentation ? (Doc ID 1636999.1)

Last updated on OCTOBER 26, 2023

Applies to:

Oracle Communications Messaging Server - Version 5.2.0 and later
Information in this document applies to any platform.



The documentation gives a good explanation of fragmentation and defragmentation and the parameters used to control them. This articles gives some examples of artificially causing fragmentation so you can demonstrate defragmentation and understand how to start gathering data to debug problems with defragmentation.

Automatic Defragmentation of Message/Partial Messages and Automatic Fragmentation of Large Messages.

More current documentation is Defragmentation channel, which also includes pointers to related docs, including Multi-host defragmentation channel operation (ie, NFS), and Defragmentation channel message retention time; and Automatic fragmentation of large messages.

Also see the section on Fragmentation and Reassembly in RFC 2046.


Troubleshooting Steps

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In this Document
Troubleshooting Steps
 To cause fragmentation
 Seeing defragmentation
 Using imsimta qm to see the details
 When does it try to do reassembly?
 Seeing the reassembly
 Doing defragmentation on the MTA rather than the destination store
 The defragment channel still exists

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