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Full Discussion: Fork Function Failed on 4GB ?
Operating Systems AIX Fork Function Failed on 4GB ? Post 302774387 by MichaelFelt on Friday 1st of March 2013 05:40:00 PM
Old 03-01-2013
no, vm or avm is only addressable virtual memory. To really see paging space used you must use svmon. There is a column Pgsp

Further, ps counts everything as if it is unique - but many segments, especially shared memory code and data, as well as kernel.

In sample below see, amng others, that segments b000b and 20002 are everywhere. ps counts, i.e. reports them everytime as if they were only in their process.

Code:
michael@x054:[/home/michael]svmon -P -t 3 | grep -v clnt

-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
 4391154 java             48179     8478        0    39022      N     Y     N

    Vsid      Esid Type Description              PSize  Inuse   Pin Pgsp Virtual
  830583         3 work working storage              s  19320     0    0   19320
   b000b         d work shared library text          s  10304     0    0   10304
   20002         0 work kernel segment               s   8816  8400    0    8816
  8004e0         - work                              s    279    75    0     279
  870547         f work working storage              s    270     0    0     270
  840564         2 work process private              s     33     3    0      33
  880568         c mmap maps 1 source(s)             s      0     0    -       -
  8e056e         b mmap maps 18 source(s)            s      0     0    -       -

-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
 5963962 java             38511     8436        0    31575      N     Y     N

    Vsid      Esid Type Description              PSize  Inuse   Pin Pgsp Virtual
   b000b         d work shared library text          s  10304     0    0   10304
  8906a9         3 work working storage              s  10083     0    0   10083
   20002         0 work kernel segment               s   8816  8400    0    8816
  9807b8         e work shared memory segment        s   1977     0    0    1977
  860686         f work working storage              s    252     0    0     252
  8c068c         - work                              s    112    33    0     112
  8606a6         2 work process private              s     31     3    0      31
  900750         b mmap maps 3 source(s)             s      0     0    -       -
  940774         c mmap maps 1 source(s)             s      0     0    -       -

-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
 4456598 cimserver        25141     8434        0    25127      N     Y     N

    Vsid      Esid Type Description              PSize  Inuse   Pin Pgsp Virtual
   b000b         d work shared library text          s  10304     0    0   10304
   20002         0 work kernel segment               s   8816  8400    0    8816
  960356         3 work working storage              s   2896     0    0    2896
  930333         2 work process private              s   2748     3    0    2748
  860366         f work shared library data          s    209     0    0     209
  850385         - work                              s    154    31    0     154
  9a035a         5 work working storage              s      0     0    0       0
  840364         a work working storage              s      0     0    0       0
  980358         4 work working storage              s      0     0    0       0
  820362         9 work working storage              s      0     0    0       0
  9e035e         7 work working storage              s      0     0    0       0
  800360         8 work working storage              s      0     0    0       0
  9c035c         6 work working storage              s      0     0    0       0
michael@x054:[/home/michael]

 

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