Re: [SLE] maximum nproc value

2 Feb 2006

      On 2/2/06, Michael Green <mishagreen@gmail.com> wrote:
...
What is maximum nproc value built into linux kernel?
I want to configure nproc in /etc/security/limits.conf as 20% of max.
What is the maximum allowable value?
Michael,

Technically, Linux (since 2.6) can handle up to around 1 billion PIDs,
but since you're asking for per a user setting use the following lines
of code:

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>

int main(int argc, char **argv) {
    long value;
    errno = 0;

    if ((value = sysconf(_SC_CHILD_MAX)) < 0) {
        if (errno != 0) {
            perror("sysconf error");
            exit(1);
        }

        fputs("_SC_CHILD_MAX not defined.", stdout);
    } else
        printf("CHILD_MAX = %ld\n", value);

    return (0);
}

Compile with

% cc nproc.c -o nproc

and invoke with ./nproc.  I have no access to a Linux box right now,
but it should work.

	\Steve

--

Steve Graegert <graegerts@gmail.com>
Software Consultant {C/C++ && Java && .NET}
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