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System Management Concepts: Operating System and Devices
The process is the entity that the operating system uses to control the use
of system resources. AIX Version 4 introduces the use of
threads to control processor-time consumption, but most of the
system management tools still require the administrator to refer to the
process in which a thread is running, rather than to the thread itself.
See the AIX 5L Version 5.1 System User's Guide:
Operating System and Devices for basic information on managing your own
processes; for example, restarting or stopping a process that you started
or scheduling a process for a later time. This guide also defines terms
that describe processes, such as daemons and zombies.
For task procedures, see Chapter 12, Process Management in the AIX 5L Version 5.1 System Management
Concepts: Operating System and Devices.
Tools are available to:
- Observe the creation,
cancellation, identity, and resource consumption of processes
- The ps command is used to report process IDs, users,
CPU-time consumption, and other attributes.
- The who -u command reports the shell
process ID of logged-on users.
- The svmon commad is used to report process
real-memory consumption. (See Performance Toolbox Version 2 and 3
for AIX: Guide and Reference for information on the
- The acct
command mechanism writes records at process termination summarizing the
process's resource use. (See how to set up an accounting system in
Accounting Overview .)
- Control the priority
level at which a process contends for the CPU.
- The nice command causes a command to be run with a
specified process priority. (See AIX 5L Version 5.1 System
User's Guide: Operating System and
- The renice command changes the priority of a given
- Terminate processes that
are out of control.
- The kill command sends a termination signal to one or
- Tune the operating
system's process-management mechanisms.
- The schedtune command permits changes to the process
scheduler parameters. See AIX 5L Version 5.1 Performance
Management Guide for information on the schedtune
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