Linux Server Buff/cache Cleanup

Use the top command to view memory and buffer usage

When the disk frequently generates IO, it causes Buff/cache to consume very high memory, resulting in little available physical memory

However, when memory is really needed, the buffer memory is automatically freed.

If you need to clean, you can use

cache cleanup Sync; echo 3 > /proc/sys/VM/drop_caches

The front plus sync is to prevent content loss

Free Pagecache:echo 1 >/proc/sys/VM/drop_caches

To free dentries and inodes: echo 2 >/proc/sys/VM/drop_caches

Both are cleaned up is sync; Echo 3 > /proc/sys/VM/drop_caches

Linux Server Buff/cache Cleanup