MaxNumberOfProcesses - UNIX

UNIX Solaris
1

Hi All,

Could you please let me know the way by which we can find : MaxNumberOfProcesses in AIX,Linux,Soalris,HP-UX machines.

Is there any command or any specific calue set for this?

2

This is a Kernel tunable and so OS specific...

3

ok vbe..Could you please let me know how can we echo these values..
Coud you give me some example.

4

On HP-UX and solaris you can try to use sysdef:
HP-UX:

$ sysdef |egrep [nu]pr*|grep -v pt
maxuprc                     450          -          3-                   -
nproc                      3712          -         10-                   -

Solaris:

$ sysdef|grep processes
   30000        maximum number of processes (v.v_proc)
   29995        maximum processes per user id (v.v_maxup)
5

Solaris:

echo pidmax/D | mdb -k
echo max_nprocs/D | mdb -k

Both normally have the same value, one is the size of the process table, the other the maximum number of simultaneous processes.
Default is 30000.

Linux:

sysctl kernel.pid_max

Gives the size of the process(-thread) table.
Default is 32768

HP-UX:

kctune nproc

Gives the maximum number of simultaneous processes. Default is 4200. Process table size is fixed to 30000.
Since HP-UX 11.31:

kctune process_id_max

Process table size. Default is 30000.

6

If the per-user compile-time limit suffices, you can use getconf CHILD_MAX . Note that the runtime limit may differ.

Regards,
Alister

7

thanks a lot .. the commands you priovided was of very much use.

On simillar front can MaxProcessMemorySize be retrived in unix ?
Please suggest.

8

You can get lots of limits with the Posix command

getconf -a

or selected values with

getconf CHILD_MAX
getconf SIZE_MAX

A bash shell shows the most important user limits with

ulimit -a

or selected values with

ulimit -u
ulimit -v