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PI48823: HIGH I/O AND CPU USAGE WITH ZOSCONNECTDATAXFORM DATA TRANSFORMER

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APAR status

  • Closed as program error.

Error description

  • The use of z/OS Connect's data transformer identified by
    configuration element zosConnectDataXform causes high I/O
    and
    CPU usage when processing bind files representing structures
    with very large number of entries. The bigger the number of
    entries, the more noticeable the issue becomes.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty Profile for z/OS using z/OS  *
    *                  Connect's data transformation support.      *
    ****************************************************************
    * PROBLEM DESCRIPTION: High CPU observed when processing high  *
    *                      volume of requests and using z/OS       *
    *                      Connect's data transformer.             *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    High CPU observed when processing a high volume of HTTP requests
    through z/OS Connect and when using z/OS Connect's data
    transformer. More specifically, the problem takes place because
    z/OS Connect's data transformer incorrectly processes WSBind
    files on every request.
    The tooling used to analyze the high CPU usage highlights
    com.ibm.cics.schema.impl.ICMImplFromWSBind as a potential
    cause.
    
    Note that processing a WSBind file on every request can also
    cause high I/O. Furthermore, the level of CPU consumption
    increases as the amount of data described in the WSBind files
    used for data transformation increases.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PI48823

  • Reported component name

    LIBERTY PROF -

  • Reported component ID

    5655W6514

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2015-09-15

  • Closed date

    2015-10-29

  • Last modified date

    2015-10-29

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

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

Fix information

  • Fixed component name

    LIBERTY PROF -

  • Fixed component ID

    5655W6514

Applicable component levels

  • R850 PSY

       UP

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Document Information

Modified date:
29 October 2015