vmware slow disk performance

bottlenecks.When the idle is less than 70% I/O, the load is high. Generally, the read speed is wait.You can also view the parameters B (number of processes waiting for resources) and Wa in combination with vmstat (percentage of CPU time occupied by I/O wait, higher than 30% when I/O pressure is high)In addition, await parameters must be referenced by svctm. Io problems may occur if the difference is too high.Avgqu-SZ is also a place to note when performing Io optimization. This is the data size

B parameter (the number of processes waiting for the resource) and the WA parameter (percentage of CPU time spent on Io wait, high io pressure above 30%)In addition, the parameters of await and SVCTM to refer to. The problem of IO is certain to be too bad.Avgqu-sz is also a place to be aware of when doing IO tuning, this is the direct operation of the data size, if the number of times, but the data are small, in fact, IO will also be very small. If the data is large, the IO data will be high. Y

Optical drive in the use of a period of time, read disk performance is getting worse, optical drive reading capacity of the poor, can be resolved by the following methods. 1. Cleaning agent Bald head. Optical drive in normal use, life is generally 2 to 3 years, the general user can use cotton swabs dipped in alcohol to clean the laser head. When you open the optical drive, you must pay attention to the