Swap space reduced drastically

Question

Hi Techies
We have solaies 10,oracle10g ,BI
Our production server is working fine but suddenly the swap space will reduced from 259GB to 100GB in 15 min of time span( when i checked in df -h) and then apllication will hang.
We have a work around like we will restart the application then the swap space will be released to the allocated
In this due time if i check prststat (process status) IGS process is consuming 150GB of space only.
what could be the reason for reducing the swap space drastically???
Is this the problem of application or Operating system
I have checked the note (724713)
Thank You
Haroon

Answer 1

Thanks for the quick reply
df -h ( detail)
Filesystem             size   used  avail capacity  Mounted on
swap                   258G   394M   258G     1%    /tmp
swap                   258G    56K   258G     1%    /var/run
swap                   258G     0K   258G     0%    /dev/vx/dmp
swap                   258G     0K   258G     0%    /dev/vx/rdmp
From the above the allocated size swap is reduced drastically when the issues arise.
There are 57 users connected to the server
the physical memory is 65 GB
( i also checked the note 425207 profile parameter
em/initial_size_MB =8192
ztta/roll_extension           2000683008 Byte