Hi,
磁盘I / O包含物理磁盘上的输入/输出操作。如果您正在从磁盘上的文件读取数据,则处理器需要等待该文件的读取(写入一样)。
我们可以关注每秒可以执行多少个输入/输出操作(IOPS), 计算的理论IOPS并将其与实际IOPS进行比较
你可以参考以下的文档去得到更多关于I/O 的解释http://blog.scoutapp.com/articles/2011/02/10/understanding-disk-i-o-when-should-you-be-worried
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Best Regards,
Mary
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