Linux vmstat Command: Functions Explained

The vmstat command is used to display the status of a system’s virtual memory, including information on virtual memory usage, disk I/O, CPU utilization, and other details. Its main functions include:

1. Display the virtual memory usage of the system, including the total amount of memory, amount used, amount free, and buffer usage.
2. Display the disk I/O status of the system, including the number of read and write operations per second, block device I/O status, etc.
3. Display the status of the system processes, including the number of running processes, the number of sleeping processes, and the number of zombie processes.
4. Display the CPU utilization of the system, including user CPU utilization, system CPU utilization, and idle CPU time.

In conclusion, the vmstat command can assist users in monitoring the performance and resource utilization of the system, enabling timely detection of bottlenecks and performance issues.