linux fedora35 buff/cache high usage solution (applicable to most linux)

When the cache reads the disk, after the data is read from the disk, it remains in the buffer (cache) to prepare for the use of subsequent programs.

When buffer writes to disk, it is first saved to the disk buffer (buffer), and then written to the disk

Three commands:

#echo 1 > /proc/sys/vm/drop_caches

#echo 2 > /proc/sys/vm/drop_caches

#echo 3 > /proc/sys/vm/drop_caches