SAP ECC6 memory and paging issues

Question

Dear Experts
I have recently upgraded my 4.6C systems to an ECC 6 system (DB2 LUW 9.5 on AIX 5.3 TL9 64 Bit OS)
I have been running the LPAR with 14 GB of memory and we are around 100-200+ users using the system, I was monitoring using nmon and found that Physical Memory was around 99.8% Used   (14311.8MB and 22.6MB was free) also the paging space was around 37.2% in result causing the system at times to run slow which can have a very negative effect on the users.
After further investigation I found that after a system restart the Physical Memory would start around 50.9% and increased at a steady pace until it reached 99.8% that is when the system would start using the paging space which would steadily increase, I found that the only solution was a system restart at least once a week to reduce the memory consumption.
At first glance it looked like a database manger memory leak with the process db2sysc, so I searched the net with the search words u201Cdb2 memory leaku201D and found the following APARs and notes.
APAR JR30285 - Pervasive memory leak when compiling SQL statements that use SQL/XML functions
APAR IZ35230 - There is a pervasive unix-specific private memory leak in the security component
Note 1288341 - Memory leak in APPLHEAPSZ -> SQL0954C 
Note 1352361 - Memory leak in shared memory area abrfci
Note 1147821 - DB6: Known Errors and available Fixes in DB2 9.5 LUW
After reading the notes and APARs I decided to updated DB2 to the latest fix pack (5SAP), but after the fix pack was implemented it did not solve the memory problem
I started look at different problems with SAP ECC6, db2 and AIX with paging/memory problems and I found the following notes to do with AIX memory and paging but none of them helped as all parameters and settings were set accordingly  
789477 - Large extended memory on AIX (64-bit) as of Kernel 6.20
191801 - AIX 64-bit with very large amount of Extended Memory
973227 - AIX Virtual Memory Management: Tuning Recommendations
884393 - AIX saposcol consumes large amount of memory.
856848 u2013 AIX Extended Memory Disclaiming 
1048686 u2013 Recommended AIX settings for SAP
1121904 u2013 SAP on AIX: Recommendations for Paging
1086130 u2013 DB6: DB2 Standard Parameter Settings
After even more investigation I found the following evidence suggesting AIX Virtual Memory Manager might have a problem

Answer 1

Shared memories inside of pool 40
Key:       42  Size:    17792992 (  17.0 MB) DB TTAB buffer              
Key:       43  Size:    53606392 (  51.1 MB) DB FTAB buffer              
Key:       44  Size:     8550392 (   8.2 MB) DB IREC buffer              
Key:       45  Size:     7014392 (   6.7 MB) DB short nametab buffer     
Key:       46  Size:       20480 (   0.0 MB) DB sync table               
Key:       47  Size:    10241024 (   9.8 MB) DB CUA buffer               
Key:       48  Size:      300000 (   0.3 MB) Number range buffer         
Key:       49  Size:     2769392 (   2.6 MB) Spool admin (SpoolWP+DiaWP) 
Shared memories outside of pools
Key:        3  Size:   114048000 ( 108.8 MB) Disp. communication areas   
Key:        4  Size:      523048 (   0.5 MB) statistic area              
Key:        6  Size:   692224000 ( 660.2 MB) ABAP program buffer         
Key:        7  Size:       14838 (   0.0 MB) Update task administration  
Key:        8  Size:   134217828 ( 128.0 MB) Paging buffer               
Key:        9  Size:   134217828 ( 128.0 MB) Roll buffer                 
Key:       18  Size:     1835108 (   1.7 MB) Paging adminitration        
Key:       19  Size:   119850000 ( 114.3 MB) Table-buffer                
Key:       41  Size:    25010000 (  23.9 MB) DB statistics buffer        
Key:       63  Size:      409600 (   0.4 MB) ICMAN shared memory         
Key:       64  Size:     4202496 (   4.0 MB) Online Text Repository Buf. 
Key:       65  Size:     4202496 (   4.0 MB) Export/Import Shared Memory 
Key:     1002  Size:      400000 (   0.4 MB) Performance monitoring V01.0
Key: 58900114  Size:        4096 (   0.0 MB) SCSA area                   
Nr of operating system shared memory segments: 16
Shared memory resource requirements estimated
================================================================
Total Nr of shared segments required.....:         16
System-imposed number of shared memories.:       1000
Shared memory segment size required min..:  692224000 ( 660.2 MB)
System-imposed maximum segment size......: 35184372088832 (33554432.0 MB)
Swap space requirements estimated
================================================
Shared memory....................: 1654.8 MB
..in pool 10  328.6 MB,   58% used
..in pool 40  143.3 MB,   30% used
..not in pool: 1174.1 MB
Processes........................:  413.4 MB
Extended Memory .................: 6144.0 MB
Total, minimum requirement.......: 8212.2 MB
Process local heaps, worst case..: 3814.7 MB
Total, worst case requirement....: 21882.9 MB
Errors detected..................:    0
Warnings detected................:    3