Content-type: text/html Man page of renice

renice

Section: Maintenance Commands (8)
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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

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. Interprets arguments following the flag as process. group IDs Interprets arguments following the flag as user names. Resets renice argument interpretation to default process IDs.  

PARAMETERS

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. [Digital]  A user name or user ID. All processes with a set_user_ID equal to the specified value are affected. [Digital]  A process group ID. All processes in the process group are affected. [Digital]  A process ID. Only this process is affected. 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: Runs affected processes when no other processes are running on the system. Runs at the base scheduling priority. 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: 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. If set to a non-empty string value, overrides the values of all the other internationalization variables. 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). Determines the locale for the format and contents of diagnostic messages written to standard error. 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

Specifies the command path  

EXIT VALUES

The following exit values are returned:

Successful completion An error occurred  

RELATED INFORMATION

Commands:  nice(1)

Functions:  getpriority(2)/setpriority(2)

Standards:  standards(5)

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Index

NAME
SYNOPSIS
STANDARDS
FLAGS
PARAMETERS
DESCRIPTION
ENVIRONMENT VARIABLES
EXAMPLES
FILES
EXIT VALUES
RELATED INFORMATION

This document was created by man2html, using the manual pages.
Time: 02:40:39 GMT, October 02, 2010