nice Command
  
  
  Purpose
  
  Runs a command at a lower or higher priority.
  
   Syntax
  
  nice [  - Increment|  -n Increment ] Command [ Argument ...  ]
  
  Description
  
  The nice command lets you run a specified Command at a lower
  priority, or at a higher priority  if you have root user authori-
  ty.  The value of the -Increment variable can range from -20 to
  20, with 20 being the lowest priority.
  
  When no Increment value is specified and only if the user has the
  appropriate privileges, the command  is  invoked  with a priority
  less than or higher than  the  current process.  If the user does
  not have the appropriate privileges to change the priority with
  the specified Increment, the nice command will not affect the
  priority, and the Command will be invoked as normal from the com-
  mand line.
  
  Note:	The csh command contains a built-in command named nice.
  The /usr/bin/nice command and built-in command do not necessarily
  work the same way.  For information on the built-in command,  see
  the  csh command.  Command is the name of any executable file on
  the system.
  
  Flags
  
  -Increment	Specifies how the priority of the command will be ad-
  justed.  The increment is a positive or negative  decimal integer
  that  will  be  used  to modify the priority.  Positive increment
  values cause a lower or unchanged priority.    Negative increment
  values may  require appropriate authority and will cause a higher
  or unchanged priority.  If the requested increment would raise or
  lower the priority beyond the limits  (-20 to 20), then the limit
  whose value was exceeded is used.  This flag is equivalent to the
  -n Increment flag.
  
  -n Increment	This flag is equivalent to the -Increment flag.
  
  Examples
  
  1.	To run a command at low priority, enter:
  
  nice cc -c *.c
  
  This runs the cc command at low priority.
  
  Note:	This does not run the command in the background.  Your
  workstation is not available for doing other things.
  
  2.	To run a low-priority command in the background, enter:
  
  nice cc -c *.c &
  
  This runs the cc command at low priority in the background.  Your
  workstation  is free so that you can run other commands while the
  cc command is running.  Refer to the  Shells OverviewAIX Version
  3.2 System User's Guide: Operating System and Devices for more
  information on background (asynchronous) processing.
  
  3.	To specify a very low priority, enter:
  
  nice -n 15 cc -c *.c &
  
  This runs the cc command in the background at a priority that is
  even lower than the default priority set by the nice command.
  
  4.	To specify a very high priority, enter:
  
  nice --10 wall <<end
  System shutdown in 2 minutes!
  end
  
  This runs the wall command at a higher priority than all user
  processes, which slows down everything  else  running on the sys-
  tem.  The <<end and end define a here document, which uses the
  text entered before the end line as standard input for  the  com-
  mand.
  
  Note:	If you do not have root user authority when you run this
  command, then the wall command runs at the normal priority.
  
  Implementation Specifics
  
  This command is part of Base Operating System (BOS) Runtime.
  
  Files
  
  /usr/bin/nice	Contains the nice command.
  
  Related Information
  
  The  csh command,  nohup command.
  
  The  nice subroutine.
  
  The  Processes Overview in AIX Version 3.2 System User's Guide:
  Operating System and Devices discusses what processes are and in-
  put and output redirection.
  
   Shells Overview in AIX Version 3.2 System User's Guide: Operat-
  ing System and Devices describes what shells are, the different
  types, and how they affect the way commands are interpreted.
  
   AIX Performance Monitoring and Tuning Commands in AIX Version
  3.2 Performance Monitoring and Tuning Guide.