Why is there so much RAM?

Question

linux

top shows

htop

How can I find out where so much RAM went?

Answer 1

The memory that is marked as cached is actually free in the sense that Linux will release it on demand and give it to the application.
In general, there is a good site: www.linuxatemyram.com

Answer 2

And what? At cha SERVERS SQL/HTTP/SSH/DNS/SMTP/FTP + antivirus are twisted.
RTFM short rus-linux.net/lib.php?name=/MyLDP/hard/memory/memo...

Answer 3

Sort top by occupied memory, I think it will help a little;)