Solution : https://service.sap.com/sap/support/notes/109515 (SAP Service marketplace login required)
Key words : 
servername            servergrp app1_c11_00           fi_groupapp2_c11_00           pp_groupapp3_c11_00           pp_group servers, structure <host>_<sid>_<num>, servername            servergrp <app_server_name>     group1<app_server_name>     group1, servergrp       dbinstance fi_group          c11 pp_group          c11 2, servergrp       dbinstance      group1           <sid>      group2          <sid>, <app_server_name>     group2<app_server_name>     group2, profile parameter rdisp/vb_dispatching, profile parameter rdisp/vbname, asynchronous updates takes place, provide fields servergrp
Related Notes : 
       
| 1618738 | SM14: Resetting update information globally | 
| 122599 | DB2/390: Performance of the update | 
| 116335 | High number of update requests |