Mario,
The workprocess overview is the central transaction to get an overview over the current processes running in the Integration Engine. The process overview is only a snapshot analysis. Thus, you have to refresh the data several times to get a feeling for the dynamics of the processes. The most important questions to be asked are as follows:
a)How many work processes are being used on average?
b)Which user is using these processes? The Business Process Engine (ccBPM) will show up with user WF-BATCH, whereas the pipeline execution is typically executed by XIAFUSER. The latter user, however, is not a fixed user, but the last one that activated the inbound scheduler (see SAP Note 369007, question 8).
c) Are there any long running processes and if so, what are these processes doing with regard to used reports and accessed tables?
d) As a rule of thumb for the initial configuration, the number of DIA work process should be around four times the number of CPU in your XI system (rdisp/wp_no_dia = 4 * #CPU).
For further help refer :
http://help.sap.com/saphelp_erp2004/helpdata/EN/69/c24e104ba111d189750000e8322d00/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/7a/6b1538e665c93ee10000009b38f842/content.htm
Hope this helps......
---Satish
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