Load Balancing Issue

[Former Member]

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

[vincentlim826]

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

[Former Member]

Hi,

SAP Webdispatcher is being used for SAP Portal System.

1. 2 App Server has Capcity 4 and 1 has Capacity 3.

2. Only Java Request and stateful Requests

3. sapwebdisp pf=webdisp.pfl -checkconfig is OK.

4. Already Enabled. "wdisp/HTTP/jsessionid_tab_support = 1"

5. Let me check the SAP Note 878226

6. webdisp patch information ? Patch is 11

Regards,

Baskar.N

[vincentlim826]

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