AIX - Swap space issue

There's a high paging swap process happen everyday from 00:00 to 15:00. It impacts all the application slow down. Could I know how could I trace and troubleshoot what process or application causes the high paging swap?
My system currently running on AIX 5.3 ML7. The system memory is 11840Mbytes and the paging space available is as below:-
Page Space      Physical Volume   Volume Group    Size %Used Active  Auto  Type
hd6             hdisk0            rootvg       12288MB     1   yes   yes    lv

This system is a client server for tsm backup. Thx in advance.
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dfkeConnect With a Mentor Commented:
If it starts every day at 00:00 excact then you might want to check the crontab for scheduled tasks:

crontab -l | grep "0 0"

You can also use tools like topas, nmon, top to display realtime performance.

For top 10 processes real time:
ps -e -o pcpu -o ruser -o args|sort -nr|grep -v %CPU|head -10
terrencetanAuthor Commented:

I capture the nmon snapshot on the CPU Utilization and the Memory Utilization of the system. Could you pls help veriify from the snapshot I attached, could it be the page steals, page scans and page fault value too high?

What I can do to minimize the huge swapping of paging space in the system? Thx in advanced again.

From that I see on the the screenshot only process dsmc from TSM (PID 635040) seemed to page at that moment.
woolmilkporcConnect With a Mentor Commented:
could it really be that your TSM backup takes such a long time (15 hrs.)?
It's not uncommon for dsmc to consume large amounts of memory.
If this is the client scheduler process, you can restart it periodically (if no activity, of course).
Tip: Type a '4' at your nmon session above to have the 'top' display sorted by size, so you can identify other processes with high memory usage.
terrencetanAuthor Commented:
OK. I'll monitor the swap space and top processes working on system during the high paging space swapping process. Thanks a lot.
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