Solution : https://service.sap.com/sap/support/notes/750205 (SAP Service marketplace login required)
Key words : 
32_64 $oracle_home/bin/oracle` solution long term solution, relinking package- link $oracle_home/bin/oracle, working directory $oracle_home/relink- cd, current oracle releases whichwere built, ibm aix fix distribution websiteand, $oracle_home/bin/oracle- create, experiencing high memory usage, existing 9ir2 oracle executable, short term solution, text memory sectionis shared
Related Notes : 
       
| 822896 | Increased Repaging Rates in AIX 5.2 and above with JFS2 | 
| 789011 | FAQ: Oracle memory areas | 
| 618868 | FAQ: Oracle performance | 
| 78498 | High paging rate on AIX servers, in particular DB servers |