nproc.5 (2010 09)

nproc(5) nproc(5)

(Tunable Kernel Parameters)

Other tunables may require a reboot to take effect. So, dramatic increases in the value of

nproc without

reboot should be made with caution.

WARNINGS

All HP-UX kernel tunable parameters are release speciﬁc. This parameter may be removed or have its

meaning changed in future releases of HP-UX.

The effective number of processes allowed to exist simultaneously may be affected by the values of the

tunables

process_id_max

and process_id_min

Some applications may have been coded with a built-in assumption that the number of processes cannot

exceed 30,000, which was the maximum imposed by prior versions of HP-UX. Such applications may fail

on conﬁgurations which allow and/or create more than 30,000 processes.

The HP-UX kernel creates internal data structures optimized for the value of the

nproc tunable param-

eter at boot time. After signiﬁcant changes to the tunable it is recommended that a reboot be scheduled

so that the kernel can reoptimize these internal data structures.

Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parame-

ter values. After installation, some tunable parameters may no longer be at the default or recommended

values. For information about the effects of installation on tunable values, consult the documentation for

the kernel software being installed. For information about optional kernel software that was factory

installed on your system, see HP-UX Release Notes at

http://www.hp.com/go/hpux-core-docs

AUTHOR

nproc was developed by HP.