z/OS MVS Programming: Sysplex Services Reference
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Performance Implications

z/OS MVS Programming: Sysplex Services Reference
SA38-0658-00

To prevent backlogs that can degrade system performance, a target must be able to process messages as fast, or faster than the sender creates them.

For the best performance, specify the message length using the MSGLEN parameter. If you omit the MSGLEN parameter, IXCMSGOX must perform processing to determine the message length.

The IXCMSGOX services that incur the least overhead when sending a message are:
  • SENDTO=MEMBER
  • NOTIFY=NO
  • MSGBUF=x
  • UNORDERED
  • GETRESPONSE=NO

Other IXCMSGOX services require additional processing.

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