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FAQ 12 OF 12

Start programs with different priority classes, how to?


You can start programs with a specific process priority via the Windows command prompt (cmd.exe), with help from the START command!



Here are the solutions for Windows XP Windows 7, 8, 8.1 and Server 2000 until 2013.

Programs with a higher priority will the system preferably treated as programs with lower priority when it comes to the allocation of responsibilities of the system!

Content:
1.) ... Examples for program starts with process priority.
2.) ... Overview of the windows programs priority parameter.
3.) ... Help file for START command in Windows command prompt.

1.) Examples for program starts with process priority.

Here in the example I start the chrome browser in priority mode /LOW, this is much lower than normal.
START /LOW "chrome" "C:\Programme\Google\Chrome\Application\chrome.exe"
In the second example, start of the program chrome with a high priority! By the parameter /HIGH
START /HIGH "chrome" "C:\Programme\Google\Chrome\Application\chrome.exe"

2.) Overview of the windows programs priority parameter.

Here the overview of priorities, from the lowest to the highest process priority!

LOW Start application in the IDLE priority class
ABOVENORMAL Start application in the ABOVENORMAL priority class
NORMAL Start application in the NORMAL priority class
BELOWNORMAL Start application in the BELOWNORMAL priority class
HIGH Start application in the HIGH priority class
REALTIME Start application in the REALTIME priority class

3.) Help file for START command in Windows command prompt.

C:\Documents and Settings\Administrator\Desktop>start /?
Starts a separate window to run a specified program or command.

START ["title"] [/Dpath] [/I] [/MIN] [/MAX] [/SEPARATE | /SHARED]
 [/LOW | /NORMAL | /HIGH | /REALTIME | /ABOVENORMAL | /BELOWNORMAL]
 [/WAIT] [/B] [command/program]
 [parameters]

"title"     Title to display in  window title bar.
path        Starting directory
B           Start application without creating a new window. The
      application has ^C handling ignored. Unless the application
      enables ^C processing, ^Break is the only way to interrupt
      the application
I           The new environment will be the original environment passed
      to the cmd.exe and not the current environment.
MIN         Start window minimized
MAX         Start window maximized
SEPARATE    Start 16-bit Windows program in separate memory space
SHARED      Start 16-bit Windows program in shared memory space
LOW         Start application in the IDLE priority class
NORMAL      Start application in the NORMAL priority class
HIGH        Start application in the HIGH priority class
REALTIME    Start application in the REALTIME priority class
ABOVENORMAL Start application in the ABOVENORMAL priority class
BELOWNORMAL Start application in the BELOWNORMAL priority class
WAIT        Start application and wait for it to terminate
command/program
      If it is an internal cmd command or a batch file then
      the command processor is run with the /K switch to cmd.exe.
      This means that the window will remain after the command
      has been run.

      If it is not an internal cmd command or batch file then
      it is a program and will run as either a windowed application
      or a console application.

parameters  These are the parameters passed to the command/program

If Command Extensions are enabled, external command invocation
through the command line or the START command changes as follows:

non-executable files may be invoked through their file association just
by typing the name of the file as a command.  (e.g.  WORD.DOC would
launch the application associated with the .DOC file extension).
See the ASSOC and FTYPE commands for how to create these
associations from within a command script.

When executing an application that is a 32-bit GUI application, CMD.EXE
does not wait for the application to terminate before returning to
the command prompt.  This new behavior does NOT occur if executing
within a command script.

When executing a command line whose first token is the string "CMD "
without an extension or path qualifier, then "CMD" is replaced with
the value of the COMSPEC variable.  This prevents picking up CMD.EXE
from the current directory.

When executing a command line whose first token does NOT contain an
extension, then CMD.EXE uses the value of the PATHEXT
environment variable to determine which extensions to look for
and in what order.  The default value for the PATHEXT variable
is:

.COM;.EXE;.BAT;.CMD

Notice the syntax is the same as the PATH variable, with
semicolons separating the different elements.

When searching for an executable, if there is no match on any extension,
then looks to see if the name matches a directory name.  If it does, the
START command launches the Explorer on that path.  If done from the
command line, it is the equivalent to doing a CD /D to that path.

C:\Documents and Settings\Administrator\Desktop>



FAQ 12: Updated on: April 1th 2014 12:23
FAQ: Windows-Command-Prompt
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12. Start programs with different priority classes, how to? ***

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