Linux下,系统平均负载指的是运行队列平均长度,也就是等待cpu的平均进程数。
在Linux中,当我们使用top命令或uptime命令时,都会发现一个这样的字段:load average
load average后面三个数字分别代表不同时间段即一分钟、五分钟和十五分钟的系统平均负载。
当然我们还可以在/proc下查看:cat /proc/loadavg
Linux load average 如何计算出来的The load on a system is the total amount of running and blocking process. For example, if two processes were running and five were blocked to run, the system’s load would be seven. 用下面的命令可以获得load average的数量也可以看到是哪些进程在等待。
ps -eo s,user,cmd | grep ^[RD] |wc -l ps -eo s,user,cmd | grep ^[RD]文章来自:Troubleshooting High Load Average on Linux