what command can show the memory be used by certain process?

[frederick van targero_1]

are there some one available?

thanks
frederick

[Vernon Brown_4]

The top command will show the top processes. Memory usage is among the things it shows.

Just enter top from the command line.

Vern

[frederick van targero_1]

Dear vern, i have tried the top command, but seems it is hard to tell me clearly, there is any other else?

thanks,
Frederick

[Martin P.J. Zinser]

Hello Frederick,

what exactly are you interested in? %MEM in top shows the percentage of physical memory a process uses. There are a number of other metrics available in top, but to get the most appropriate you would need to be more specific. There are also additonal fields available for display that can be selected interactively. Check man top for details.

top is good for on-line interactive checking if you do have other objectives please clarify.

Greetings, Martin

[Vernon Brown_4]

There's one if you like the Gnome GUI.

Gnome destop has a system monitor. You can get to it by clicking the Gnome button > system > more programs > system monitor.

Vern

[frederick van targero_1]

Dear Martin,

As what my said before, that my system will almost run out my RAM in several days, furthermore, even if I close the application at that time, only few RAM (may be one third) can be freed. So I want to have a look, what process do occupy me memory? whether some application can not release their memory after references? the top command seems do the CURRENT call process nor the static.

rgds,
Frederick

[dirk dierickx · Accepted solution]

try this command: 'ps -eo cmd,pid,user,pmem,rss,sz'
it should give you plenty of information regarding memory usage of processes.

[Mark Grant]

What application do you run?

You mind find that is shared memory that is eating your RAM.

"ipcs -m" will show you whose using shared memory and how much.

[Claudio Cilloni]

'top' can sort its process list by memory usage (high usage first). hit 'M'.

I think it is absolutely normal to find all your RAM used after some time of activity. Remember that RAM contains not only processes, but other things like disk cache buffer; and not all processes shrink their memory occupation when they need less memory space; they will reuse the allocated space later, when needed.

Ciao
Claudio