The kernel does not pay these memory that can be re -used to free.

The memory incorporated into the kernel management may not be in use, and it also includes the memory that can be used repeatedly in the past. The total memory (USED) in the fourth row refers to the number of memory controlled by the system kernel, and the total free memory (free) is the number of kernels that have not been included in its control range. Fourth line: memory statusģ808060K Total -total physical memory (4GB)ģ660048K Used -Total memory (3.6GB) in use (3.6GB)ġ48012K Free - Total amount of free memory (148M)Ĥ184924K TOTAL -total amount of exchange zone (4G)Ġk userd -total amount of switching area used (0M)Ĥ184924K Free - Total amount of free exchange zone (4G)Ģ483956K CACHED - Total amount of switching area for buffer (2483M) If you do not understand the user space and the kernel space, you need to charge it. The use ratio of the CPU here is different from the Windows concept. Tasks -task (process), the system now has 135 processes, of which 1 is running, 134 in sleep (Sleep), 0 in the state state, and 0 in ZOMBIE status (zombies).Ġ.3% US -user space occupies a percentage of CPU.Ġ.0% SY -kernel space occupies a percentage of CPU.Ġ.0% NI -The percentage of the process that changes the priority occupation occupies the CPUĠ.0% WA -IO waiting to occupy the percentage of CPUĠ.0% Hi -Hardware IRQ) occupies a percentage of CPUĠ.0% SI -Software Interrupts occupies a percentage of CPU If this number is removed from the number of logical CPUs, the result is higher than 5 that the system is operating overload. Load Average data is the number of active processes that check every 5 seconds, and then calculate the value calculated according to a specific algorithm. Load Average: 0.00, 0.00, 0.00 -Load Average's three numbers are 1 minute, 5 minutes, and 15 minutes. 10 Days, 3:05 -The system has run 10 days, 3 hours and 5 minutes (I haven't restarted during this period)ġ Users -Currently there is a user login system

Linux command to check cpu usage