1, top or uptime
first row:
11:12:26 [Current Time]
up 3:44 [system running time, format too: min],
4 users [Current User Number],
load average: 0.38, 0.31, 0.19 [system load, i.e. the average length of the task queue. Three values were 1 minute, 5 minutes, 15 minutes prior to the current average value]
Twenty-three line processes and CPU information:
The total number of total process
The number of processes running running
Number of sleeping the sleep of the process
stopped stopped process number
zombie zombie number of processes
Cpu(s):
0.3 % US user space occupied percentage of CPU
1.0 % SY core CPU space occupancy Percentage
0.0 -priority processes within% ni user process space, changed the percentage of CPU
98.7 % the above mentioned id idle CPU percentage
0.0 % WA waiting for input and output of the percentage of CPU time
0.0 % hi: hardware interrupt CPU occupancy percentage
0.0 % Si: soft interrupt percentage occupancy
0.0% st: virtual machine occupancy percentage
Load average is defined as the process tree running average queue within a specific time interval. If a process following conditions are met then it will be located in the run queue:
a) It is not waiting for I / O operation results
b) It does not take the initiative to enter the wait state ( that is not called 'wait')
c) is not stopped ( eg: waiting termination)
The above output, load average behind are 1 minute, 5 minutes, 15 minutes load. Is the number of data every 5 seconds to check a dynamic process, and then calculated based on this value. If this number is divided by the number of CPU, the result of higher than 5 when he shows that the system is overloaded, normally maintained at 0.7 and below!
