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

SYNOPSIS
  The following syntax format is recommended:

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

  The following syntax format is obsolescent:

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

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

  renice: XCU5.0

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

OPTIONS
  -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 operands following the option as process group IDs.

  -u	    Interprets operands following the option as user names.

  -p	    Resets renice operand interpretation to be process IDs (the
	    default).

OPERANDS
  priority A value interpreted as the actual system scheduling priority,
	   rather than as an increment to the existing system scheduling
	   priority as specified in the recommended form of the command.  The
	   priority value may be any integer from -20 to 20, including 0, as
	   explained in the DESCRIPTION section.

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

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

  pid	   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 option specified.	If no options
	   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 ID operands (in the recommended syntax format) or the
  option arguments (in the obsolescent syntax format) are interpreted as
  process IDs, process group IDs, or user names.  When you issue the renice
  command with the -g option, all processes in the process group have their
  scheduling priority altered.	When you run the renice command with the -u
  option, 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.

  [Tru64 UNIX]	The preceding values are mapped by the command to those
  actually used by the kernel.

  [Tru64 UNIX]	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)

  Others: standards(5)

Index for Section 8

Alphabetical listing for R

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