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Load Balancing Issue

Hi Experts,

We are using SAP Web Dispatcher Version 7.00 for dispatching the requests to Portal System (SAP Netweaver 7.0). We have three Application Server for the Portal System. We found that the requests are not getting dispatched from Web Dispatcher to Application Servers based on the Capacity and Reponse time of the Application Servers, rather one application server is highly utilized. And the Application Server is under utilized. We have the Load Balancing Strategy Parameter as "Weighted Round Robin". Please let me know if you guys have any idea.

Regards,

Baskar.N

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1 Answer

  • Posted on Aug 04, 2011 at 03:35 AM

    Hi,

    - are all app server in same capacity ?

    - what sort of request ? abap / java / both ? stateful or stateless request ?

    - sapwebdisp pf=webdisp.pfl -checkconfig ...ok ?

    - try add parameter "wdisp/HTTP/jsessionid_tab_support = 1" to the

    web dispatcher profile as per SAP note 878226.

    - webdisp patch information ? able reproduce the same issue in latest webdisp patch ?

    Regards,

    Vincent

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    • Hi Baskar,

      Regarding the load balancing, please consider the following points:

      o Load balancing is carried out at request level and NOT at session

      level. If requests are stateful and must be returned to their

      server, they are not involved in load balancing.

      o If the system load is high, static parameters such as capacity,

      become less and less important, since the system attempts to

      determine the actual server utilization dynamically and balances

      the system accordingly.

      o Load balancing will never achieve a completely balanced

      distribution - deviations of 10-20% are tolerable.

      Regards,

      Vincent

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