Pb with % of CPU with options 'ug' and '-o pcpu' of ps command - Aix

This is a discussion on Pb with % of CPU with options 'ug' and '-o pcpu' of ps command - Aix ; Hi, I'm writing a shell to spot the *current* worst CPU percentage running on my server, but when I run 'ps' commands and sort the output I've noticed I get values greater than 100: $ ps -e -o user= -o ...

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Thread: Pb with % of CPU with options 'ug' and '-o pcpu' of ps command

  1. Pb with % of CPU with options 'ug' and '-o pcpu' of ps command

    Hi,
    I'm writing a shell to spot the *current* worst CPU
    percentage running on my server, but when I run 'ps'
    commands and sort the output I've noticed I get values
    greater than 100:

    $ ps -e -o user= -o pid= -o pcpu= -o vsz= -o rss= -o s= -o time= -o
    args= |sort -r -n +2
    oracle 1503300 311004.1 22508 18460 Jul 13 84286931-15:48:10 /
    local/user/pg ...
    oracle 1859740 23788.8 18168 41192 May 11 84286931-10:11:47
    ora_lck0_sid
    oracle 1757314 23788.8 18232 39908 May 11 84286931-13:03:50
    ora_lmon_sid


    $ ps ug|sort -r -n +2|head -8
    oracle 1503300 310413.2 1.0 24288 18448 - A Jul 13
    -31227311:-26 /local/user/pg ...
    oracle 1859740 23785.3 1.0 104648 41140 - A May 11
    -31227648:-29 ora_lck0_sid
    oracle 1773668 [...]

    It seems that the %CPU is above 100 when the process's
    been running for days or weeks.

    Is there a way to tell the 'ps' to retain PID's that
    have been running SINCE TODAY only ?
    (if I do a 'grep' on 'Jul 19' I'll miss all lines looking
    like
    $ oracle 978970 0.0 2.0 95104 46324 - A 14:46:18 0:00
    ora_j000_
    i.e. lines containing only the hour/mn/sec of the current
    date...)

    Thanks in advance for any help,
    Seb


  2. Re: Pb with % of CPU with options 'ug' and '-o pcpu' of ps command

    On 19 Jul, 13:53, Sébastien de Mapias wrote:
    > Hi,
    > I'm writing a shell to spot the *current* worst CPU
    > percentage running on my server, but when I run 'ps'
    > commands and sort the output I've noticed I get values
    > greater than 100:
    >
    > $ ps -e -o user= -o pid= -o pcpu= -o vsz= -o rss= -o s= -o time= -o
    > args= |sort -r -n +2
    > oracle 1503300 311004.1 22508 18460 Jul 13 84286931-15:48:10 /
    > local/user/pg ...
    > oracle 1859740 23788.8 18168 41192 May 11 84286931-10:11:47
    > ora_lck0_sid
    > oracle 1757314 23788.8 18232 39908 May 11 84286931-13:03:50
    > ora_lmon_sid
    >
    > $ ps ug|sort -r -n +2|head -8
    > oracle 1503300 310413.2 1.0 24288 18448 - A Jul 13
    > -31227311:-26 /local/user/pg ...
    > oracle 1859740 23785.3 1.0 104648 41140 - A May 11
    > -31227648:-29 ora_lck0_sid
    > oracle 1773668 [...]
    >
    > It seems that the %CPU is above 100 when the process's
    > been running for days or weeks.
    >
    > Is there a way to tell the 'ps' to retain PID's that
    > have been running SINCE TODAY only ?
    > (if I do a 'grep' on 'Jul 19' I'll miss all lines looking
    > like
    > $ oracle 978970 0.0 2.0 95104 46324 - A 14:46:18 0:00
    > ora_j000_
    > i.e. lines containing only the hour/mn/sec of the current
    > date...)
    >
    > Thanks in advance for any help,
    > Seb


    if you write it in perl, you'll have greater control at what to find

    open (PS, "ps -ef|") or die "unable to ps";

    while () {
    something in here - reg exp???

    }


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