Linux clear memory and cache methods

Freeing memory and caching methods under Linux

$ free-m

Run sync to write the contents of the cache back to the hard drive

$ sync

# Format: Sync

Forces the file buffer content in memory to be written to disk.

Clean up the free cache by modifying the drop_caches of the proc system

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

$ free-m

Clear page Cache only (Pagecache)

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

Clear Catalog Items and Inode

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

Clear page cache, directory entries, and inode

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

0– not release

-Free Page Cache

-Release file node cache and directory item cache

3– Release All Caches

Linux clear memory and cache methods