HI,
I have a few questions regarding memory management in SAP system.
I read about it a lot butI still confused 
My question is:
1. How I know how much memory all the WPs is used? (How much memory all the WPtakesfrom the OS)
2. How I know how much memory all the DIA's is used? (How much memory all the DIAtakesfrom the OS)
Idontwantseperateit to extend memory roll areaetc, I want to know percentage of memory all the WP takes from the OS.
I asked it becauseineed to increase the number of DIA in the APO system, but before the change I want to know how much memory the WP and the DIA used now, I want to avoid frommemory problemin the OS afteriincrease the number of DIA.
My server is always around 80% memory used, but I limit the memory used bySAP systemwith the parameter PHYS_MEMSIZE, and Idontthink the SAP takes all the PHYS_MEMSIZE parameter value.
And it'stakeme to the 3 question:
3.howI know how much memory the SAP system takes fromOS? I limit the memory used by SAP with PHYS_MEMSIZE, but I want to know exactly how much memory the SAP takes and if he used all the valueigive in the PHYS_MEMSIZE.
Maybe Idontneed to increase memory in the server just to increase the number of DIA
Thanks for your help my freinds 
Naor