Solaris Troubleshooting : Memory usage checking and troubleshooting

Ramdev

I have started unixadminschool.com ( aka gurkulindia.com) in 2009 as my own personal reference blog, and later sometime i have realized that my leanings might be helpful for other unixadmins if I manage my knowledge-base in more user friendly format. And the result is today's' unixadminschool.com. You can connect me at - https://www.linkedin.com/in/unixadminschool/

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18 Responses

  1. seema says:

    Hello Ramdev I have swap issues application are running java
    # Reduce memory load on the system
    # Increase physical memory or swap space
    # Check if swap backing store is full i have run swap -l swap -s checked df -k /tmp but how will i know or say apps team this is reason … when i run prstat or vmstat how can i explain from output to apps team or how can i support …

  2. Yogesh Raheja says:

    prstat -a will give the apps consuming high cpu and mem.

  3. seema says:

    thanks @ yogesh ….. Can you provide me link or oracle recommended doc for LDOM creation i have T5220 … i have done my research but when i look into come documents they give me commands … i would like to know how physical resources are partition for logical domain …. while on my reasrch any issue will update ..

  4. Yogesh Raheja says:

    @Seema, I configured Ldoms 3 years back. Since then till now I havent got a chance again to play with Ldoms. But let me check if I have a config. doc with me. Else I will try my level best to search and provide you with the same.

  5. Michael says:

    good one 

  6. Michael says:

    ps -e -o vsz=MEMSIZE -o args=COMMAND

    • Ramdev says:

      @Micheal – this is a good command, and i would like you to explain the purpose of this command on your own words, to our other folks.

  7. Andy says:

    Hi,

    I read your steps and, found it useful. Some of the commands you provided do not mention what to look for and, what do they mean. For example “ipcs -a”. can you explain in plain english what it is showing (I know it is shared memory. how can I use it to my advantage).

  8. Ramdev says:

    Hi Andy, What I look there normally is SEGSZ  ( i.e. shared segment size ) and the owner and group of the segment. 

  9. sameer says:

    I found good information here. My issue is resolved. Thanks for sharing this information.

  10. Brad says:

    Thanks for above info. Is there a quicker way to get the total/cumulative private physical memory used by processes? I see such a number can be figured out by a combination of above commands, but ones like pmap -x /proc/* and mdb -k take a long time to complete. 

  11. Ramdev says:

    HI Brad, sorry … I couldn’t think of any other quickest way of doing this.

  12. swamy says:

    swap -l showing
    swapfile dev swaplo blocks free
    /dev/dsk/c0t0d0s1 32,25 16 1946032 1946032

    here free means
    is it 1946032 this much is free ?
    i didn’t under stood

  13. Ramdev says:

    Swamy, Yes. that actually indicates your system not yet using the swap file system.

  14. Madhukiran Attivilli says:

    which command, when run from local zone, provides physical memory of the system, as seen from global zone?

    • Madhukiran Attivilli says:

      In other words, how to determine whether a local zone has capped-memory configured, by running a command or application program from local zone itself, and not from global zone?

  1. September 16, 2015

    […] Read – Memory usage checking and troubleshooting […]

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