不能正常工作的网卡、硬盘或内存，都可能导致系统花费很长的时间等待信息。
A bad network card, hard drive, or memory might result in your system spending a long time waiting for information.
b——在您指定的时间间隔内，位于虚拟内存等待队列中的内核线程的平均数量。
B-the average number of kernel threads that are in the virtual memory waiting queue over your timing interval.
工作流不会在内存中挂起，不会阻塞线程，也不会在等待输入时耗尽进程。
The workflow doesn't hang around in memory blocking a thread and using up a process while it's waiting for input.
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