PM71966: WMQ Z/OS DOES NOT PROVIDE A MECHANISM TO INCREASE THE SIZE OF TCP/IP SEND AND RECEIVE BUFFERS.

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as new function.

Error description

  • Customers may need to increase the internal TCP/IP buffer sizes
    in order to improve network performance on high latency
    networks. There is no way to do this on z/OS today without
    changing the defaults for the entire TCP/IP stack.
    

Local fix

  • Change the default send/receive buffer sizes for the whole
    TCP/IP stack.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of WebSphere MQ for z/OS           *
    *                 Version 7 Release 0 Modification 1 and       *
    *                 Release 1 Modification 0.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION: WebSphere MQ does not allow default     *
    *                      TCP/IP send and receive buffer sizes to *
    *                      to be overridden.                       *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Customers who wish to use larger TCP/IP send or receive buffers
    must currently do so by changing the stack-wide defaults in
    TCP/IP itself.
    
    This APAR provides a basic switch to allow MQ to use larger
    buffers without configuring them at the stack level.
    

Problem conclusion

Temporary fix

Comments

  • Applying the PTF for this APAR will not enable this function. It
    should only be used under direction from IBM Support.
    
    Please contact IBM Support if you are interested in using this
    capability.
    

APAR Information

  • APAR number

    PM71966

  • Reported component name

    WMQ Z/OS V7

  • Reported component ID

    5655R3600

  • Reported release

    010

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-08-31

  • Closed date

    2013-02-18

  • Last modified date

    2013-03-04

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

    UK91754 UK91755

Modules/Macros

  • CSQXCCIT CSQXCLIT
    

Fix information

  • Fixed component name

    WMQ Z/OS V7

  • Fixed component ID

    5655R3600

Applicable component levels

  • R010 PSY UK91754

       UP13/03/01 P F302

  • R100 PSY UK91755

       UP13/03/01 P F302

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



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Document information


More support for:

z/OS family

Software version:

7.0.1

Reference #:

PM71966

Modified date:

2013-03-04

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