Linux's method of cleaning up swap and cache

This article mainly introduces "the method of linux cleaning swap and cache". In the daily operation, I believe that many people have doubts about the way linux cleans up swap and cache. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "linux cleaning swap and cache". Next, please follow the editor to study!

Swap cleanup:

The code is as follows:

Swapoff-a & & swapon-a

Note: there is a prerequisite for this cleanup. The free memory must be larger than the swap space already used.

Cache cleanup:

The code is as follows:

Sync; sync; sync; & & echo3 > / proc/sys/vm/drop_caches

Sleep 2

Echo 0 > / proc/sys/vm/drop_caches

To free pagecache:

The code is as follows:

Echo 1 > / proc/sys/vm/drop_caches

To free dentries and inodes:

The code is as follows:

Echo 2 > / proc/sys/vm/drop_caches

To free pagecache,dentries and inodes:

The code is as follows:

Echo 3 > / proc/sys/vm/drop_caches

The value of / proc/sys/vm/drop_caches defaults to 0 (so after we empty it, we restore it to 0)

At this point, the study on "linux's method of cleaning up swap and cache" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!