Linux性能调优之CPU性能优化
A process in a runnable state is either using the CPU or waiting to use the CPU. A process in uninterruptable state is waiting for some I/O access， eg waiting for disk.这个例子中磁盘 I/O 导致了 iowait 升高，不过， iowait 高不一定代表 I/O 有性能瓶颈。
A process in a runnable state is either using the CPU or waiting to use the CPU. A process in uninterruptable state is waiting for some I/O access， eg waiting for disk.这个例子中磁盘 I/O 导致了 iowait 升高，不过， iowait 高不一定代表 I/O 有性能瓶颈。