Linux clears swap and buffercache

In linux, swap and buffercache are cleaned up because system management in linux increases the number of swap and cache. The following is a summary of how swap is disabled/swap is enabled: view swapon-s Mount point swapswapoff/dev/sda1 mount point swapswapon/dev/sda1... in linux, the number of swap and buffer caches is increased due to system management in linux. Therefore, we need to clear the number of swap and cache. The following is a summary of swap processing to disable/enable swap: view the mount point swapon-s to uninstall swap swapoff/dev/sda1 (Mount point) run the following command to clear the swap swapon/dev/sda1 cache: sync & echo3>/proc/sys/vm/drop_caches & sleep 2 & echo 0>/proc/sys/ vm/drop_caches To free pagecache: echo 1>/proc/sys/vm/drop_caches To free dentries andinodes: echo 2>/proc/sys/vm/drop_caches To free pagecache, dentries and inodes: echo 3>/proc/sys/vm/drop_caches value. The default value is 0 (so we can restore it to 0 after clearing it)