AIX - Swap space issue

Posted on 2008-11-04
Last Modified: 2013-11-17
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.
Question by:terrencetan
    LVL 10

    Accepted Solution

    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

    Author Comment


    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.

    LVL 10

    Expert Comment

    From that I see on the the screenshot only process dsmc from TSM (PID 635040) seemed to page at that moment.
    LVL 68

    Assisted Solution

    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.

    Author Comment

    OK. I'll monitor the swap space and top processes working on system during the high paging space swapping process. Thanks a lot.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    How to run any project with ease

    Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
    - Combine task lists, docs, spreadsheets, and chat in one
    - View and edit from mobile/offline
    - Cut down on emails

    Let's say you need to move the data of a file system from one partition to another. This generally involves dismounting the file system, backing it up to tapes, and restoring it to a new partition. You may also copy the file system from one place to…
    Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded‚Ķ
    Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
    This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.

    737 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    21 Experts available now in Live!

    Get 1:1 Help Now