Common commands for Linux/Uinx to view system resource usage

1.Top

This common Monitored object is the average load and CPU load. Use top help to obtain the specific parameters.

 

2.Iostat

This command displays the following items by default:

% USER: user-level applicationProgramCPU usage percentage

% SYS: Percentage of CPU usage of system-level applications

% Iowait system/Application wait for percentage of disk I/O requests not completed

% Idle indicates that the system is idle.

 

3.Vmstat

Reports virtual memory statistics

Procs column:

R indicates the number of kernel threads in the running queue.

B indicates the number of kernel threads in the waiting queue

Memory column:

SWPD indicates swap memory

Free indicates idle memory.

Buff unknown

Cache indicates the buffer.

The swap column, I/O column, system column, CPU column, and so on can play a monitoring role!

 

PS: the commands for viewing system resources vary with host platforms.

For example, using the TOP Command on UNIX systems to view CPU and resource information is more accurate;

The usage of the top command in Linux is inaccurate because there is no thread in Linux, so there are many different processing methods!