1. vmstat basic command
1.1 Example of basic operation
vmstat 6 6 [Sampling 6 times in 6 seconds]
The result is as follows:
1.2 Detailed explanation of the meaning of each field of the output result
| Composition of vmstat | field | meaning |
| process | r | The number of processes in the run queue |
| b | number of blocked processes | |
| Memory | swpd | Use virtual memory size |
| free | Available memory size | |
| buff | The memory size used by the buffer | |
| cache | The amount of memory used by the file system cache | |
| exchange | and | The size written from the swap area to memory per second |
| so | The memory size written to the swap area per second | |
| IO | bi | Number of blocks read from disk |
| bo | The number of blocks written to disk | |
| system | in | System interrupts, interrupts per second |
| cs | Process context switches, the number of context switches per second | |
| CPU | us | User process execution time, user mode |
| and | System process execution time, kernel mode | |
| of | wait for IO time | |
| id | free time |
2. vmstat [+option] command
| usage | Detailed explanation | storage location |
| vmstat -a | Show active and inactive memory | |
| vmstat -f | Displays the number of forks since the system was started | Obtained from the processes field in /proc/stat |
| vmstat -s | Displays memory-related statistics and various system activity quantities | /proc/meminfo,/proc/stat和/proc/vmstat |
| vmstat -d | View disk read and write | /proc/diskstats |
| vmstat -p | Display the specified disk partition statistics | /proc/diskstats |
| vmstat -m | View system slab information | /proc/slabinfo |
| vmstat -S | Display using specified units. The parameters are k , K , m , M | |
| vmstat -V | Display vmstat version information |
References:
1. Detailed Explanation of Linux vmstat Command
2. (Summary) Linux monitoring tool vmstat command detailed explanation (ha97.com)