文件名称：Extreme Linux Performance Monitoring Part II
文件大小：427KB
文件格式：PDF
更新时间：2021-07-06 12:53:45
linux performance
介绍linux io 监控和优化，文字简单到位。 Disk IO subsystems are the slowest part of any Linux system. This is due mainly to their distance from the CPU and the fact that disks require the physics to work (rotation and seek). If the time taken to access disk as opposed to memory was converted into minutes and seconds, it is the difference between 7 days and 7 minutes. As a result, it is essential that the Linux kernel minimizes the amount of IO it generates on a disk. The following subsections describe the different ways the kernel processes data IO from disk to memory and back.