Top:
- total - value total
- free - free
- used - used
- buff/cache - disk buffer
- avail Mem - amount of memory that can be allocated to processes without causing more swapping
- total - value is simply the total number of processes
- running - Runnable(R) state executing on the CPU
- sleeping - Interruptible (S) Uninterruptible sleep (D)
- stopped - Stopped (T) these processes have been stoped by a job control signal
- zombie - Zombie (Z) such terminated processes whose data structures are still around are called zombies
%Cpu(s):
- us - is the time the CPU spends executing processes in userspace
- sy - kernelspace processes
- ni - a manually set "nice" and gets a low priority
- id - idle
- wa - waiting for I/O to complete
- hi - hardware interrupts
- si - software interrupts
- st - steal time , the CPU is busy on some other virtual machine (VM)
The load average section represents the average "load" over one ( 60 sec ), five and fifteen minutes. On Linux the load is the number of processes in the R and D states at any given moment. On a multi-core system you should first divide the load average with the number of CPU cores to get a similar measure.
- PID
- USER
- PR - priority of the process
- NI - the "nice" value of a process
- VIRT - the total amount of memory consumed by a process
- RES - is the memory consumed by the process in RAM
- SHR - the amount of a memory shared with other processes
- %MEM - expresses value as a persentage of the total RAM available
- S - single-letter form show the process state
- TIME+ - total CPU time used, precise to the hundredths of a second
- COMMAND - the name of the processes