basics of memory mgmt in hpux

Hi!
I have a hpux11.23 server, running Oracle and several instances of a
propriety, memory-consuming C application.
I experience problems in memory utilization.

There is 8GB of RAM installed in it.

swap report in Glance shows:
avail: 16GB, Resv: 9.3GB, Used: 3.1GB, Resvd Util: 58%
with following swap devices
/dev/vg00/lvol2 - avail: 8GB, Used 0MB, type: device, pri: 1
pseudo-swap - avail: 8GB, Used 3.1GB, type: memory, pri: -1

which I understand as a lot of free virtual memory (16 - 3.1 = 12.9
[GB]).

But memory report says that:
Total VM : 8.1gb Sys Mem : 1.9gb User Mem: 4.4gb Phys
Mem : 8.0gb
Active VM: 4.0gb Buf Cache: 1.6gb Free Mem: 103mb
FileCache: n

What means I have almost no free memory.

How can I increase free memory by tuning up the system? Why Total VM
doesn't show 16 GB while swap avail says its 16 GB?

I cannot simply add more memory or reduce number of applications.

thanks for any advice.

regards, Julian Kania

.

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