Solution : https://service.sap.com/sap/support/notes/450351 (SAP Service marketplace login required)
Key words : 
virtual host ip address reason, virtul host ip address, existing savf qgpl/savr3sys, consistently high cpu-usage, symptom performance problems occur, data area chkxda/jobq, qxdarecvr database shadow processing, specially allocated work process, current sql command completes, monitor-job chkxdajobs finds
Related Notes : 
       
| 484548 | iSeries: 3 tier system installation |