WAP Cleanup:
The code is as follows:
Swapoff-a && swapon-a
Note: This cleanup has a precondition that the free memory must be larger than the swap space already in use
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 clear it, we also restore it to a value of 0)
The above is to clean up the Linux system swap, buffer and cache methods introduced, swap cleanup is a prerequisite, and swap, buffer timing cleanup is also necessary.
Linux swap switch and Buffer,cache etc cleanup