What is TIME column in top command?

What is TIME column in top command?

The manual describes the TIME column as: TIME. Total CPU time the task has used since it started. If cumulative mode is on, this also includes the CPU time used by the process’s children which have died. You can set cumulative mode with the S command line option or toggle it with the interactive command S.

What does TIME mean in Htop?

TIME is the cumulative time the CPU (any CPU) spent running any thread in the process since it was started.

How do you read top command output?

S – indicates the status of the process: S=sleep R=running Z=zombie (S) %CPU – This is the percentage of CPU used by this process (0.3) %MEM – This is the percentage of RAM used by the process (0.7) TIME+ –This is the total time of activity of this process (0:17.75)

What is VIRT RES SHR in top?

VIRT: How much virtual memory the process is using. RES: How much physical RAM the process is using, measured in kilobytes. SHR: How much shared memory the process is using. S: The current status of the process (zombied, sleeping, running, uninterruptedly sleeping, or traced).

What is S in top command?

‘S’ and ‘D’ are two sleep states, where the process is waiting for something to happen. The difference is that ‘S’ can be interrupted by a signal, while ‘D’ cannot (it is usually seen when the process is waiting for the disk). ‘T’ is a state where the process is stopped, usually via SIGSTOP or SIGTSTP .

What is virt in top command?

VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the video card’s RAM for the X server), files on disk that have been mapped into it (most notably shared libraries), and memory shared with other processes.

Is Htop better than top?

Why Htop is Better Than Top Monitoring Tool It has a nicer text-graphics interface, with colored output. It is easy to use and highly configurable. Allows for scrolling process list vertically and horizontally to see all processes and complete command lines. Htop is also much faster than top.

How do you sort memory by top command?

Sort By memory Usage per-process in the interactive menu

  1. press Shift+f to enter the interactive menu.
  2. press the up or down arrow until the %MEM choice is highlighted.
  3. press s to select %MEM choice.
  4. press enter to save your selection.
  5. press q to exit the interactive menu.

What is the output of top command?

Top command shows all running processes in the server. It shows you the system information and the processes information just like up-time, average load, tasks running, no. of users logged in, no. of CPU processes, RAM utilisation and it lists all the processes running/utilised by the users in your server.

What is VIRtual memory in top command?

VIRtual column of the top, refers to the super-space (super consumption space) of the process, which the process might not be actually taking at the run time. There is another column RESident , which refers to the actual physical memory/space allocated by the process, at the runtime.

What is %MEM in top command?

If you want to make top a bit more memory-friendly, issue the command top -o %MEM, which will cause top to sort all processes by memory used (Figure 2). Figure 2: Sorting process by memory used in top. The top command also gives you a real-time update on how much of your swap space is being used.

Which is the correct format for time command?

Following formatting options are described below – %P, %M, %S, %e, %E, %C, %Z, %c, %x. This option gives percentage of the CPU that the process of command (i.e. run under time command) has got for its execution. This is just user + system times divided by the total running time.

What does time + in top mean in Linux?

Haven’t looked at the source code of top, but it seems like 3019:57 in column TIME+ means 3019 minutes 57 seconds of accumulated CPU time. I confirmed it on my system.

How to add time output to a file?

Append Time Statistics Output to an Existing File using -a option This option allows appending time command output into file. It is used along with -o option. This option avoids overwriting of content of output file by appending time command output into specified output file.

How to use time command in Linux shell?

12 UNIX / Linux Time Command Output Format Option Examples. Linux time command is helpful to identify the time taken by a command. Using Linux time command, you can figure out how much time was taken to execute a command, or shell script, or any other program. By default, time command executes the given command or program.