Chapter 23Managing System Processes (Tasks)
This chapter describes the procedures for managing system
processes. This is a list of the step-by-step instructions in this chapter.
Commands for Managing System Processes (Overview)
The following table describes the commands for managing system processes.
Table 23-1 Commands for Managing Processes
Command | Man Page | Description |
|---|
ps, pgrep, prstat | ps(1), pgrep(1), and prstat(1M) | Checks the status of active processes
on a system, as well as displays detailed information about the processes |
dispadmin | dispadmin(1M) | Lists default scheduling policies |
priocntl | priocntl(1) | Assigns processes to a priority class and manages process priorities |
nice | nice(1) | Changes the priority of a timesharing process |
psrset | psrset(1M) | Binds specific process groups to a group of processors rather than to just
a single processor |
The Solaris Management Console's Processes Tool enables you to manage
processes with a user-friendly interface. For information on using and starting
the Solaris Management Console, see "Working With the Management Console (Tasks)"
in System Administration Guide: Basic Administration.
The ps Command
The ps command enables you to check the status of
active processes on a system, as well as display technical information about
the processes. This data is useful for such administrative tasks as determining
how to set process priorities.
Depending on which options you use, the ps command
reports the following information:
The following table describes some fields that are reported by the ps command. Which fields are displayed depend on which option you
choose. For a description of all available options, see ps(1).
Table 23-2 Summary of Fields in ps Reports
Field | Description |
|---|
UID | The effective user ID of the process's
owner. |
PID | The process ID. |
PPID | The parent process ID. |
C | The processor utilization for scheduling.
This field is not displayed when the -c option is used. |
CLS | The scheduling class to which the process
belongs such as real-time, system, or timesharing. This field is included
only with the -c option. |
PRI | The kernel thread's scheduling priority.
Higher numbers indicate a higher priority. |
NI | The process's nice
number, which contributes to its scheduling priority. Making a process "nicer"
means lowering its priority. |
ADDR | The address of the proc
structure. |
SZ | The virtual address size of the process. |
WCHAN | The address of an event or lock for
which the process is sleeping. |
STIME | The starting time of the process in
hours, minutes, and seconds. |
TTY | The terminal from which the process,
or its parent, was started. A question mark indicates that there is no controlling
terminal. |
TIME | The total amount of CPU time used by
the process since it began. |
CMD | The command that generated the process. |
How to List Processes
You can use the ps command to list all the processes
on a system.
ps | Displays only the processes that are
associated with your login session. |
-ef | Displays full information about all
the processes that are being executed on the system. |
-c | Displays process scheduler information. |
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