![3.prstat – the prstat command iteratively examines all active processes on the system and
reports overall statistics on screen.
Syntax – prstat [option] <count> <interval>
4.preap – you can use the preap command to clean up a defunct or a zombie process.
5.pstop – A process can be temporarily suspended with the pstop command.
• You need to specify the PID of the process to be suspended.
# pstop 1234](https://image.slidesharecdn.com/processandthreadmanagementinsolarisoperatingsystem-221115014056-b497c72e/85/Process-and-Thread-Management-in-Solaris-Operating-System-pptx-5-320.jpg)
![Scheduling Processes
Scheduling Processes includes assigning priorities to the processes based on the
importance and the need.
Using these command one can increase the priority of the process.
1.cron Utility – cron utility allows tasks to be automatically run in the
background at regular intervals by the cron daemon. These are often termed as
cron jobs in solaris.
- cron daemon: Is a software process that runs in the background
continuously and provides the service to the client upon request.
2.at command – the at command lets you specify a one-time action to take
place at some desired time.
syntax- at [-m] <time> <date>
• atq- to check your jobs that are waiting in the queue.
syntax – $ at –l [job-id]
• at –r – this command is use to remove any existing at job.
syntax - # at –r [job-id]](https://image.slidesharecdn.com/processandthreadmanagementinsolarisoperatingsystem-221115014056-b497c72e/85/Process-and-Thread-Management-in-Solaris-Operating-System-pptx-8-320.jpg)
Process and Thread Management in Solaris Operating System.pptx
- 1. Process and Thread Management in Solaris Operating System Created by – Samyak Jain MCA/25014/2022 Submitted to – Shripal Vijayvargiya Sir
- 2. What is Process? A Process is an instance of a running program or a program in execution. A Process can create another process called a child process,any process that creates the child process is called the parent process. This creation of new processes from existing parent processes is called forking. Each process is identified uniquely with a positive integer number names PID.
- 3. Process and Thread Management Managing processes becomes important in a multiuser environment such as Solaris. There are three broad categories of tasks associated with the management of the systems processes: Monitoring the Processes Viewing the PID,UID and PPID Viewing the priority of the process Viewing the Resource Usage(in terms of memory and processor utilization) Viewing the state of the process ,etc. Controlling the Processes using Signals Assigning the priority to the processes Scheduling the Processes
- 4. Monitoring the Processes In Solaris, you can monitor processes that are exactly on a system by using one of the commands listed. 1.ps command – the ps command can be used to view the processes running on the system. • ps prints information about processes that have the same effective user ID and the same controlling terminal as the invoker of ps command. • The output contains only the process ID(PID), terminal identifier (TTY),cumulative execution time (TIME), and the command name (CMD). 2.pgrep – the pgrep command examines the active processes on the system and reports the process IDs of the processes whose attributes match the criteria specified on the command line.
- 5. 3.prstat – the prstat command iteratively examines all active processes on the system and reports overall statistics on screen. Syntax – prstat [option] <count> <interval> 4.preap – you can use the preap command to clean up a defunct or a zombie process. 5.pstop – A process can be temporarily suspended with the pstop command. • You need to specify the PID of the process to be suspended. # pstop 1234
- 6. 6. prun – A temporarily suspended process can be resumed and made runnable with prun command. # prun 1234 7.pwait – pwait command blocks and wait for termination of a process. 8.pwdx – the current working directory of a process can be displayed using the pwdx command 9.pfiles – A list of files open within a process can be displayed with the pfiles command
- 7. Controlling the Processes Controlling the processes in solaris includes clearing hung processes, terminating unwanted or misbehaving process, changing the execution priority of a process , resuming a suspended process , and so on. The different ways the process can be controlled in solaris:- 1. The nice and renice Commands – the nice value of a process represents the priority of the process. - Every process has a nice value in the range from 0 to 39 being the nicest. - Higher the nice value, the lower the priority. - by default ,user processes start with a nice value of 20. 2. Signals – Solaris supports the concepts of signals, which are software interrupts. - Signals can be used for communication between processes. - A signals notifies the receiving process about an event.
- 8. Scheduling Processes Scheduling Processes includes assigning priorities to the processes based on the importance and the need. Using these command one can increase the priority of the process. 1.cron Utility – cron utility allows tasks to be automatically run in the background at regular intervals by the cron daemon. These are often termed as cron jobs in solaris. - cron daemon: Is a software process that runs in the background continuously and provides the service to the client upon request. 2.at command – the at command lets you specify a one-time action to take place at some desired time. syntax- at [-m] <time> <date> • atq- to check your jobs that are waiting in the queue. syntax – $ at –l [job-id] • at –r – this command is use to remove any existing at job. syntax - # at –r [job-id]
- 9. THANK YOU