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How does Linux view the percentage of memory usage?

First go to the Linux desktop and right-click to open the terminal; then enter the top command on the command line, which can display the resource consumption of each process in the system in real time; finally, look at line 3 "Cpus".

Content interpretation

First line (top):

15:24:36 current time of the system

14 operating time from the startup of the days system to now

3 users the number of users currently logged in to the system, or more specifically, the number of terminals logged in to the user-the connection of the same user to multiple terminals of the system at the same time will be regarded as multiple users connected to the system, and the number of users here will also be shown as the number of terminals

The average of the current system load of load average. The last three values are the average number of processes 1 minute ago, 5 minutes ago, and 15 minutes ago, respectively. Generally speaking, when this value exceeds the number of CPU, CPU will be more laborious to load the processes contained in the current system.

The second line (Tasks):

Total number of current system processes in 288 total

1 the number of processes currently running in running

The number of processes currently waiting for sleeping

0 stoped number of system processes stopped

0 zombie number of zombie processes

The third line (Cpus):

7.3% us user space occupies CPU percentage

2.0% sy kernel space occupies CPU percentage

Percentage of CPU occupied by processes that have changed priorities in the process space of 0.0% ni users

90.4% id idle CPU percentage

0.3% percentage of CPU time wa waits for input and output

0.0% hi

0.0% si

0.0% st

Line 4 (Mem):

2042616 total total physical memory

Total physical memory used by 1770116 used

272500 free total free memory

163912 buffers amount of memory used as kernel cache

Line 5 (Swap):

Indicates that the category is the same as the fourth line (Mem), but here reflects the use of the swap partition (Swap). In general, the frequent use of swap partitions (Swap) will be seen as the result of insufficient physical memory.

2094076 Total total Exchange area

45052 Total switching areas used by used

2049024 free total free swap area

346624 Total swap areas for cached buffers

This is how Linux looks at the percentage of memory usage. For more details, please pay attention to other related articles!

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