Index for Section 8

Alphabetical listing for R

renice(8)
NAME
  renice - Alters the priority of a running process

SYNOPSIS
  /usr/sbin/renice [-n increment] [-p] [-g | -u] ID ...

  /usr/sbin/renice priority [-p] pid ...  [-g pgrp ...] [-u user ...]

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  renice:  XPG4, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

FLAGS
  -n increment
	    Takes the current priority and adds the increment.	A negative
	    value for increment causes the process to run at a lower
	    numbered, therefore faster, priority.

  -g	    Interprets arguments following the flag as process.	 group IDs

  -u	    Interprets arguments following the flag as user names.

  -p	    Resets renice argument interpretation to default process IDs.

PARAMETERS
  priority The value specified is taken as the actual system scheduling
	   priority, rather than as an increment to the existing system
	   scheduling priority.	 The value may be any integer from -20 to 20,
	   including 0 as explained in the DESCRIPTION section.

  user	   [Digital]  A user name or user ID.  All processes with a
	   set_user_ID equal to the specified value are affected.

  pgrp	   [Digital]  A process group ID.  All processes in the process group
	   are affected.

  pid	   [Digital]  A process ID.  Only this process is affected.

  ID	   A value interpreted as a user name, user ID, a process group ID,
	   or a process ID, depending on the flag specified.  If no flags are
	   specified, the value is interpreted as a process ID.



DESCRIPTION
  The renice command alters the scheduling priority of one or more running
  processes.  The arguments are interpreted as process IDs, process group
  IDs, or user names.  When you issue the renice command with the -g flag,
  all processes in the process group have their scheduling priority altered.
  When you run the renice command with the -u flag, all processes owned by
  the user have their scheduling priority altered.  By default, the processes
  affected are specified by their process IDs.

  Only root can alter the priority of other user's processes and can set the
  priority to any value in the range from -20 to 20.  Users without root
  privileges are restricted to altering the priority of processes they own
  and can only increase their "nice value" within the range of 0 to 20.

  The following priorities are particularly useful:

  20	    Runs affected processes when no other processes are running on
	    the system.

  0	    Runs at the base scheduling priority.

  negative number
	    Runs affected processes very quickly.

  [Digital]  The preceding values are mapped by the command to those actually
  used by the kernel.

  [Digital]  Users who do not have root privileges cannot increase the
  scheduling priorities of their own processes (even if they had originally
  decreased those priorities).

ENVIRONMENT VARIABLES
  The following environment variables affect the execution of renice:

  LANG	   Provides a default value for the internationalization variables
	   that are unset or null. If LANG is unset or null, the
	   corresponding value from the default locale is used. If any of the
	   internationalization variables contain an invalid setting, the
	   utility behaves as if none of the variables had been defined.

  LC_ALL   If set to a non-empty string value, overrides the values of all
	   the other internationalization variables.

  LC_CTYPE Determines the locale for the interpretation of sequences of bytes
	   of text data as characters (for example, single-byte as opposed to
	   multibyte characters in arguments).

  LC_MESSAGES
	   Determines the locale for the format and contents of diagnostic
	   messages written to standard error.

  NLSPATH  Determines the location of message catalogues for the processing
	   of LC_MESSAGES.

EXAMPLES
  To change the priority of process IDs 987 and 32, and all processes owned
  by the daemon and root users, enter:

       renice +1 987 -u daemon root -p 32




FILES
  /usr/sbin/renice
	    Specifies the command path


EXIT VALUES
  The following exit values are returned:

  0   Successful completion

  >0  An error occurred

RELATED INFORMATION
  Commands:  nice(1)

  Functions:  getpriority(2)/setpriority(2)

  Standards:  standards(5)