A command-line system monitor tool that produces a frequently-updated list of processes.

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3
votes
2answers
549 views

How is FireFox running on a virtual machine that has no display?

I am using a Red Hat virtual machine, accessible only remotely. However when I use the top command, one of the displayed processes taking up the most memory is firefox, located at ...
3
votes
1answer
318 views

HP-UX SZ limit for ps?

Right so I have a fun little thing that I'm deathly confuzzled about. I have a program that is running and I am getting the following: using top: SIZE RES 1639M 359M using ps: SZ 20171 ...
41
votes
1answer
47k views

In Linux “top” command what are us, sy, ni, id, wa, hi, si and st (for CPU usage)?

When I issue $ top in linux, I get a result similar to this (see here). One of the lines has CPU usage information represented like this: Cpu(s): 87.3%us, 1.2%sy, 0.0%ni, 27.6%id, 0.0%wa, ...
9
votes
1answer
4k views

Why the value of VSIZE in top is different from the value of VSZ (Virtual set size) in ps?

I know VSZ in ps is for the total address space allocated for the app and is sometimes aliased as vsize (mentioned in man page of ps on linux), but what's the definition of VSIZE in top? This top ...
11
votes
6answers
8k views

How to make a process invisible to other users?

How could you launch a process and make it invisible to the top command? The process is started by a normal user (not root), and should not be visible to other normal users.
1
vote
1answer
393 views

Where does top / gnome-system-monitor get its information about cpu usage?

I am curious where gnome-system-monitor and top (the command line tool) get their information about the CPU usage in %. Could you please explain it to me?
1
vote
1answer
582 views

Make top shows only server process

Can I make top show info about the web and db servers? Can it be done by piping the pids to the top? They can be many process from every one?!? Or is there any better method for this?
3
votes
1answer
1k views

Why Process CPU % Usage larger than Total CPU Time

When I run the TOP command, a process shows 1208% cpu usage and the total CPU usr time is 81.7% with IRIX mode on. When I change to IRIX mode off, the process shows 99% cpu usage and the total user ...
1
vote
1answer
366 views

Queries about top command

top command shows the process cpu utilization, and it when we sum the cpu utilization of all the processes then it goes greater than 100%. And how can it shows the cpu utilization of each process( ...
18
votes
2answers
5k views

Why does `htop` show more process than `ps`

In ps xf 26395 pts/78 Ss 0:00 \_ bash 27016 pts/78 Sl+ 0:04 | \_ unicorn_rails master -c config/unicorn.rb 27042 pts/78 Sl+ 0:00 | ...
7
votes
3answers
3k views

Understanding top and load average

I'm observing a high load average on a certain machine (about 9) in all three load fields. I understand load as the number of processes in state "run" / currently desiring CPU time. Am I correct at ...
3
votes
2answers
851 views

Using top to see processes run by a user on behalf of sudo

If I run top -u username I will see all the processes by a particular user. Is there a way to also see all the processes that the user called via sudo?
6
votes
3answers
4k views

How to select specific processes with 'top'?

In case of one program having multiple instances, running pidof program gives: `1 2 3` top -p accepts comma-delimited arguments: 1, 2, 3. This means that top -p `pidof program` won't work: ...
8
votes
2answers
926 views

How to find out how much memory a program taking

I use htop to watch my processes, but most of services ran are multi threaded, so they are shown on several lines with a % of memory use which in some cases is the same for all, sometimes it varies ...
25
votes
5answers
41k views

How to find which processes are taking all the memory?

I'm looking for somthing like top is to CPU usage. Is there a command line argument for top that does this? Currently, my memory is so full that even 'man top' fails with out of memory :)
4
votes
1answer
171 views

How can I turn off the realtime display of unix command “top”?

I want top to just give me the results when I call it and then exit. How can this be done? top's manpage does not list any flag for this purpose. Also, I do not want to use ps -eLf for the purpose.
5
votes
2answers
1k views

Number of running processes show in top

The usual maximum number that I have seen in the "running" field displayed in top(1) is the number of logical CPUs installed in the system. However, I have observed that under Ubuntu 10.04 (not ...
27
votes
5answers
31k views

How to monitor CPU/memory usage of a single process?

I would like to monitor one process's memory / cpu usage in real time. Similar to top but targeted at only one process, preferably with a history graph of some sort.