@yonle@fedinet.waltuh.cyou It's not the bright side because unused RAM is wasted. The Linux kernel will utilize a large amount of free RAM to cache disk r/w. It is a massive speed-up, especially for your database and frequent file reads. Page caches will automatically be dropped when your processes require more memory. That is the ideal condition. But given this `free` script, it's not ideal because Contabo forcibly drops the cache every hour. That means my disk I/O is not properly cached in RAM, even if I have a large amount of RAM. Dropping the cache means forcing the kernel to read frequently accessed files from slower storage (disk) rather than RAM.