PM76621: PERFORMANCE DEGRADATION BETWEEN IBM SPSS STATISTICS 20 AND 21 WHEN WORKING WITH THE DATASET'S DATA DICTIONARY

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APAR status

  • Closed as program error.

Error description

  • Customer is reporting slow execution of syntax in IBM SPSS
    Statistics 21 when compared to SPSS Statistics 20FP1.
    
    Tests provided is only an example to show the difference between
    the versions. Customer states that performance degrades when
    working with the data dictionary, in this example, renaming
    existing variables.
    
    Test Environment:
    OS: Windows 7 64-bit
    RAM: 4GB
    CPU: Intel Xeon DualCore @1.24GHz
    
    Stats 20 test runs:
    38.10
    42.86
    40.42
    40.34
    33.20
    33.52
    31.77
    32.70
    36.39
    35.03
    AVG: 36.433
    
    Stats 21 test runs:
    69.43
    65.65
    70.53
    68.56
    72.41
    69.33
    69.98
    70.97
    71.87
    74.10
    AVG: 70.283
    
    CONCLUSION: Timings for IBM SPSS Statistics 21 are almost double
    the average of IBM SPSS Statistics 20. This is considered to be
    unacceptable, especially since their syntax are much larger and
    the time difference will be greater for their production jobs.
    
    Expectation is that IBM SPSS Statistics 21 will complete the
    syntax around the same execution time, definitely not double the
    time taken to complete in IBM SPSS Statistics 20.
    

Local fix

  • This has been reported to IBM SPSS Statistics development team
    for investigation.
    
    This issue will be addressed in an upcoming Fix Pack. Please
    refer to the Fix Pack schedule at
    http://www-01.ibm.com/support/docview.wss?uid=swg21599157 for
    information on upcoming Fix Packs.
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * This problem occurs on all users of IBM SPSS Statistics 21   *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * PERFORMANCE DEGRADATION BETWEEN IBM SPSS STATISTICS 20 AND   *
    * 21                                                           *
    * WHEN WORKING WITH THE DATASET'S DATA DICTIONARY              *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Please upgrade to IBM SPSS Statistics 21 Fix Pack 1.         *
    ****************************************************************
    

Problem conclusion

  • This issue has improved in IBM SPSS Statistics 21 Fix Pack 1,
    however, performance is still slightly slower than IBM SPSS
    Statistics 20.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM76621

  • Reported component name

    SPSS STATISTICS

  • Reported component ID

    5725A54ST

  • Reported release

    L00

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-06

  • Closed date

    2013-03-13

  • Last modified date

    2013-03-13

  • 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

    SPSS STATISTICS

  • Fixed component ID

    5725A54ST

Applicable component levels

  • RL00 PSN

       UP

  • RL00 PSY

       UP



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Document information


More support for:

SPSS Statistics
Statistics Desktop

Software version:

21.0

Reference #:

PM76621

Modified date:

2013-03-13

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