Solution : https://service.sap.com/sap/support/notes/822896 (SAP Service marketplace login required)
Key words : 
2 - apar iy57046    remove repaging rate checks, automatically increases page replacement/paging activity, aix virtual memory manager algorithm, 3 - apar iy62337tune maxclientrecommendationto tune jfs2, 2 performance management guidebackgroundthe main problem, increased repaging rates observed, tune minperm/maxperm/maxclientrecommendation, 'vmm page replacement' section, recommendationsregarding aix vmm tuning, reduce paging activity
Related Notes : 
       
| 866482 | Performance problems NW04 because of paging | 
| 793113 | FAQ: Oracle I/O configuration | 
| 750205 | High memory usage with AIX5.2/5.3 and Oracle9.2 | 
| 78498 | High paging rate on AIX servers, in particular DB servers |