Showing posts with label tuning in linux. Show all posts
Showing posts with label tuning in linux. Show all posts

Monday, August 5, 2013

Tuning Processes


In real-time systems some processes can cause huge problems, or slowing down the system performance. In such situations we need to tune the running processes. With tuning I mean stopping or killing the process. To be able to do this and to know when we need to know what processes currently runnig and when process start up? Especially, administrators need this. Because unexpected processes needs to be down or stop in systems such as servers, gaming boxes or other real-time systems. By saying processes I mean all applications and services in the system. So after that we need to view the running processes, let's look at that.

Viewing Running Processes

The only thing that consume your system resources are running processes. If your computer seems to be running slower than normal, then it is probably because of some misbehaving running processes or some running processes that use more than resources our system have.

There a couple of ways to view running processes, these are:

     1. top command: this command lists all running processes by ordering them cpu usage and memory usages.
     2. ps -ef command: this command lists every running processes in full detail.
     3. The Graphical System Monitor(SystemAdministration►System Monitor): also enables you to list all the running processes.

Sample listing of running processes from ps-ef command:

Sample listing of running processes from top command:

Killing Processes

To kill a process, we can use PID(process id). As you can see from outputs of two commands above we have process ids for each running process. For example, to kill PID 217 we type kill 217. This command will kill the process have PID of 217. To suspend (stop) a running process use kill -STOP PID, to continue to a suspended process use kill -CONT PID.
Example: As an example run an application, find its PID using above commands, and first kill, then suspend and later allow to continue the process.

Finally, we finished the tuning process techniques in linux. I hope it will help you..

If you have any question or need some help about tuning process , leave a comment below.

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