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top -b -n 1 -p 1184

TOP LEGEND

%Cpu(s):

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

us - user cpu time (or) % CPU time spent in user space

sy - system cpu time (or) % CPU time spent in kernel space

ni - user nice cpu time (or) % CPU time spent on low priority processes

id - idle cpu time (or) % CPU time spent idle

wa - io wait cpu time (or) % CPU time spent in wait (on disk)

hi - hardware irq (or) % CPU time spent servicing/handling hardware interrupts

si - software irq (or) % CPU time spent servicing/handling software interrupts

st - steal time % CPU time in involuntary wait by virtual cpu while hypervisor is servicing another processor (or) % CPU time stolen from a virtual machine

Process table

The column headings in the process list are as follows:

PID: Process ID.

USER: The owner of the process.

PR: Process priority.

NI: The nice value of the process.

VIRT: Amount of virtual memory used by the process.

    Virtual memory, labelled VIRT: How much memory your process thinks it’s using. Usually much bigger than RES, thanks to the Linux kernel’s clever memory management.

This includes swapped memory, the memory from external libraries, and allocated memory that’s not used.

RES: Amount of resident memory used by the process.

    Resident memory, labelled RES: How much physical memory, how much RAM, your process is using. RES is the important number.

This includes memory allocated from shared libraries, given they are still present in memory. Also, it includes all heap and stack memory.

SHR: Amount of shared memory used by the process.

S: Status of the process. (See the list below for the values this field can take).

%CPU: The share of CPU time used by the process since the last update.

%MEM: The share of physical memory used.

TIME+: Total CPU time used by the task in hundredths of a second.

COMMAND: The command name or command line (name + options).