Top is a UNIX program that shows system usage in real time.

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Is there a way to show windows processes in Cygwin constantly

I would like to monitor processes from a cygwin shell, using top or a variant. The reason for this is its realtime reporting and constant updates. However under cygwin, top will not report on windows ...
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showing memory transactions as Bps in Linux

Is there a Linux tool that shows the memory transactions as Bps (BYTE/sec)? Not the memory usage as which process allocates how much virtual address. But the memory bandwidth that which process uses ...
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2answers
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Difference between nice value and priority in the top output

top, by default, lists both columns. I am curious as to what is the difference. I checked out the man pages and cannot figure it out: Priority: h: PR -- Priority The priority of the task. ...
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10 views

user/sys/irq separate load averages

Is there a way to get load averages for each type of load on Linux? I have a router doubling as a web server and I'd like to have a load average for user+sys (i.e, time spent serving pages, roughly) ...
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5answers
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individual cpu % in 'top' output

Usually to view individual cpu % we press '1' in the interactive mode of top. However I am not able to figure out the logic to get the same output in batch mode i.e, top -n1b I am redirecting this ...
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24 views

Top -l returning always 0.0 CPU usage when requesting single PID

On Mac OS X 10.9 (Mavericks) & 10.10 Yosemite I’m unable to get the correct CPU usage for a single process using the top -l command for example top -l 1 -ncols 3 -pid <pid> Even though I ...
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2answers
1k views

Where has all my memory gone?

I have a linux server that keeps using up all its memory and I can't see what is using it. Running top gives the following response: Tasks: 103 total, 1 running, 102 sleeping, 0 stopped, 0 ...
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1answer
2k views

cpu load measure with hyperthreading on linux

How can I get the true usage of a multicore hyperthreading enabled cpu? For example lets consider a 2 core CPU, expressing 4 virtual cores. A single threaded workload would now show up as 100% in ...
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26 views

Debian server is showing 0% for all processes in top / htop

I have a Debian 6 server that has always show correct CPU% in top / htop. Today when the load shot up I went to take a look and bot top and htop show all processes at 0% cpu. Weather the load is ok, ...
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2answers
22 views

how to make top show multiple CPUs (no toggling)

Is there any way to make top show multiple CPUs by default? I know how to toggle (1) But I'm running it on batch mode and the output is redirected to a file.
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1answer
2k views

How to kill an invisible process?

I have a program that crashed, its GUI is frozen, and I would like to kill it. However there is no trace of it among the current processes. I tried both top and ps -A, but I got nothing. The ...
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18 views

CentOS: Can Top -u Display 2 or More Users?

Showing processes for 1 user is rather easy with Top: top -u someuser1 or by hitting u while top is running. Is there any way to make Top show processes specifically for 2 (or more) users? An example ...
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1answer
369 views

How to install top & htop on Ubuntu 8.04.2 LTS (hardy)

Env. Rackspace Ubuntu 8.04.2 LTS (hardy) I am in a corner situation where I need to maintain carefully a legacy server before I can plant for an upgrade. Actually an upgrade is not an option, I ...
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68 views

Negative Priority in Top Output

interesting problem: I have four brand new servers with 4, 16-core AMD Opteron 6300 processors that have recently been installed with RHEL 6.2 with the MRG kernel. I'm trying to optimize the servers ...
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1answer
42 views

How much time does top command consider while finding CPU usage percentage? [duplicate]

Top gives me an output like: %Cpu(s): 4.7 us, 1.3 sy, 0.0 ni, 93.9 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st if my CPU has spent 4.7% of its time on user processes, how much of time history has it ...
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2answers
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If “top” indicates CPU is spending 10% on %wa (iowait), does that mean the CPU is idle?

I am referring to the Linux top command. If it indicates 10.4% was spent on wa, does that mean 10.4% CPU was available for other processes? top - 09:40:45 up 178 days, 34 min, 1 user, load ...
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1answer
32 views

How to know, which process had accessed the harddrive last time and when?

How to know, which process had accessed the harddrive last time and when? Like ntopng with "last seen", but in local? The question is about Linux.
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23 views

Script output from Curses program like mtop

I'm trying to write some automated scripts to store things like cpu usage etc. In 'top' there is a batch mode, so I can output this fine. In a program like mtop, where it uses 'Curses' and no batch ...
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4answers
7k views

Writing a CPU/RAM usage log over a period of time to file on CentOS

I'm looking for an application or line of code that would let me observe a process, save the info in a number of variables, then put the gathered info on a file. I've been trying with variations of ...
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7answers
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Linux “Top” command for Windows Powershell?

I am looking for a PowerShell cmdlet that can provide similar functionality to the Linux Top app. Something that refreshes at some given interval and displays the process list with CPU % util. I have ...
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20 views

ATOP Parseable Output with TAB instead space

Does anyone know how can i export ATOP data using tab as separator instead of spaces? Or if are there any way to replace the spaces outside parentheses for tabs? Thanks a lot
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1answer
40 views

How to save the output from top/atop

I wanted to know if there a way to save the output from top or atop commands into a textfile for later processing. atop|top > output.txt is not really working at both top and atop keep running in ...
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1answer
618 views

Why is the kernel and the watchdogs consuming all the CPU?

I run a bunch of heavy user space processes on a powerful Xeon machine (32 virtual processors according to /proc/cpuinfo). The CPU load is normally around 30 and the machine feel responsive, but later ...
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3answers
66 views

linux - is there a more advanced version of top?

Is there any type of super-top command that will show the results through time? With regular top, it will tell me for an instant what processes are using what, but is there anything that will show ...
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TOP command memory usage

Under SuSE, (Mem: 31908592k total, 31421504k used,) how do i know which process or program using my memory?
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1answer
97 views

Low load average with plenty of cpu-intersive processes

I see loadavg at about 1 with at least 3 processes running at full tile. How can that be? top - 11:48:32 up 147 days, 5:38, 8 users, load average: 1.08, 1.11, 1.05 Tasks: 416 total, 4 running, ...
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1answer
397 views

iotop complains “CONFIG_TASK_DELAY_ACCT not enabled in kernel” only for specific process

I'm trying to use iotop to determine whether the CPUs are waiting on I/O at any point for a specific program called bwa (it's a next-generation sequence alignment program). If I start iotop without ...
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1answer
59 views

Iostat and top show static resource usage on first value

For one of my projects, I need to obtain resource (CPU, I/O and disk-space) usage programatically. Currently I'm running shell commands (iostat) and parsing the results which works relatively well ...
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2answers
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Understanding top command in unix

When I run top -c command on my UNIX box I get the output below: top - 03:09:34 up 5 days, 6:14, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 175 total, 1 running, 174 sleeping, 0 stopped, ...
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0answers
12 views

how to sort top output when top is executed

Is there a way to sort the output from top when it's executed? rather than pressing M or T after you run the command. I'm trying to save the output of top -n 1 -U username but I'd like to sort it by ...
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1answer
93 views

Weird output from linux `top` command

I got a weird output from command top, which shows the summation of the RES column is greater than my physical memory. For instance, I have a host with 64G physical memory and the swap partition has ...
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1answer
2k views

Top command cache vs free memory

When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage: "Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached" It looks ...
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1answer
46 views

What is the point of sorting by PID and username in top?

I've been using the top program to find the most CPU and memory hungry programs on linux systems. Only recently did I discover the multi-window mode. The default windows number 2 (teal) and 4 (yellow) ...
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1answer
175 views

Sorted tree view in htop or alternative?

I am running a Debian flavor of Linux, and I use htop to keep track of memory usage, since it is more detailed than top. I can't seem to get it to sort by memory and display process trees at the same ...
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1answer
256 views

Is it possible to change default behavior for “top”?

For example, when I run top I usually press "C" so I can see the explicit command being run not the executable name if you will. Is there a way I can modify top such that when I do: % top The ...
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1answer
437 views

What I should know about memory management?

first of all: I don't use stackadmin or similar so please don't vote for moving there, I'm reading man top and paper "what every programmer should know about memory ..." I need really simple ...
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1answer
69 views

top output Time+ information misleading

I am running SuSE 11.2. Shen I am running "top" command on one of my machine, it looks like this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ...
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217 views

99% used memory, but 70% of unused allocated memory and 97% swap available: what can I do?

In a server with 48GB of RAM, when I run top, I see that less than 500 MB are free (1%), whereas when I sum up the column of % of memory used by each process, it is around 30%. Since only the 2.7% of ...
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2answers
342 views

How to use the top command in Unix to only see process using more than 10% CPU?

I want to use top, but not see all of the processes that are using minute chunks of computing power. Can someone tell me how to use top to see things above a certain cpu % cutoff? I tried just using ...
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2answers
41 views

Redirecting top when multiple CPU's shown

If you run top, and then press 1, it shows the breakdown of usage on each CPU. How can I redirect this to a file? I know I can do top -n 1 > process.txt but how can I get the 1 option in the ...
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2answers
5k views

Is it possible to 'hide' a process from the listing of `ps` or `top` on Linux

First, I presume that if this is possible it would need to be done as root (or as a user who shares root's UID of 0). How can a process be launched so that it does not show up in a ps aux or ps ef or ...
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1answer
4k views

Is there `top` for disk usage [duplicate]

How to track disk usage (write/read and other cool stuff) in realtime with fashion of top in the only right system in shell? It would be cool if it could monitor specific directory.
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1answer
219 views

pidstat -u -I shows cpu usage 385%

I have a guest running in qemu doing linux kernel compilation. From host, I am watching its usage with below command pidstat 4 -p pid_of_process -u -I -I flag should average out for all number of ...
0
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1answer
249 views

RAM size mismatch: top/htop vs dmidecode

I've got lenovo ideapad Y530. According to dmidecode, I should have 3GB RAM: tomasz@tomasz-lenovo-ideapad-Y530:~$ sudo dmidecode --type memory [sudo] password for tomasz: # dmidecode 2.9 SMBIOS 2.4 ...
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3answers
5k views

top command in cygwin?

I am starting to use Cygwin(64) on my Windows 8 laptop, however, the 'top' command is not recognized. I have read online that I need to get the 'procps' package, but it is not available on the 'Cygwin ...
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2answers
56 views

In the linux top program, what does the z option indicate

I'm trying to understand the top program better, and I don't really get the 'z' option which highlights all running processes. Wouldn't all processes in top be considered running? In what context ...
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1answer
495 views

Is using top a robust way of measuring system CPU usage?

I got confused while reading this question on stack overflow. The asker says: "'top' will simply not do, as there is a delay between cpu dumps, it requires 2 dumps and several seconds, which hangs ...
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98 views

Top missing some processes

I'm getting weird behavior using top in Arch Linux. When filtering by user (fred) I get a different list of processes depending on the sort order. In descending PID order: PID USER %CPU %MEM ...
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1answer
789 views

ps and top give different CPU usage

I've seen a few posts similar to this, most notably here, but wasn't quite satisfied with the answers. I'm comparing top and ps results on a specific process and see huge discrepancies in CPU usage. ...