The rest of the CPU was just overhead waiting for database and network related IO.
剩余的CPU开销只是在等待数据库和网络相关的IO。
Tomcat uses NIO (Non-blocking IO) to keep the connection alive without wasting the waiting threads.
Tomcat使用NIO（无阻塞IO）来保持连接活动，无需浪费等待中的线程。
IOWaittime: the time elapsed in waiting for the IO.
IOWaittime：等待io花费的时间。
There is often two entry points to a scheduler, voluntary (waiting for IO etc) and involuntary, spin lock issues will almost always be involuntary, so this should reduce your work rate.
通常有两个入口点调度器，自愿（等待IO等）和不自觉的，几乎总是会无意识的旋转锁问题，所以这应该降低你的工作效率。
There is often two entry points to a scheduler, voluntary (waiting for IO etc) and involuntary, spin lock issues will almost always be involuntary, so this should reduce your work rate.
通常有两个入口点调度器，自愿（等待IO等）和不自觉的，几乎总是会无意识的旋转锁问题，所以这应该降低你的工作效率。
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