Linux disk read and write slow issue tracking

Linux systems react very slowly and disk reads are particularly slow

Then I conclude that the process of subsequent investigation is
1, vmstat 1 10 check memory read and write situation

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2, iostat-x 1 Check disk read and write situation
3, top-d 1 view application load
4. Strace-p View app Execution action
Finally find out the cause by the action

: Due to insufficient memory to read physical memory, physical memory read speed and slow, this time there is disk IO pressure is very large, and read speed and slow

This article is from the "Automation Rolin" blog, so be sure to keep this source http://luoguoling.blog.51cto.com/1568501/1697903

Linux disk read and write slow issue tracking