PM82434: APPLYING INPUT SMOOTHING TO WORK FACTOR (WF) CALCULATION TO MITI GATE TRANSIENT SPIKES OF CPU UTILIZATION AND THROUPUTS

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Some transient spikes of CPU utilization and throuputs
    causes the Work Factor (WF) to stay high for
    prolonged time which causes unnecessary requests
    queuing.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of WebSphere Extended Deployment  *
    *                  Vesion 6.1.0.0 - 6.1.1.5, WebSphere Virtual *
    *                  Enterprise 7.0.0.0 - 7.0.0.2, and           *
    *                  WebSphere Application Server 8.5            *
    ****************************************************************
    * PROBLEM DESCRIPTION: Apply input smoothing to work factor    *
    *                      calculation to resolve the transient    *
    *                      spikes of CPU utilization and           *
    *                      throughputs.                            *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Transient spikes of CPU utilization and throughputs cause
    the work factor to stay high for a long period of time. This
    behavior causes unnecessary requests queuing.
    

Problem conclusion

  • The code was updated to apply input smoothing, and to adjust the
    CPU utilization importance factor during the work factor
    calculation. This update ensures faster response to input
    changes.
    This fix will be included in the next available fix pack for
    WebSphere Virtual Enterprise.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM82434

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-08

  • Closed date

    2013-02-08

  • Last modified date

    2013-02-08

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

    PM73053

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

Fix information

  • Fixed component name

    WEBS APP SERV N

  • Fixed component ID

    5724H8800

Applicable component levels

  • R850 PSY

       UP



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Document information


More support for:

WebSphere Application Server
General

Software version:

850

Reference #:

PM82434

Modified date:

2013-02-08

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