Currently, blocklist.de has the following Stats/User:
Daily Mails: ~400100
Web-Traffic: ~130 GB
RBL-/API-Traffic: ~120 GB (all Mirrors)
Mail (In/Out)-Traffic: ~~300 GB
Traffic over IPv6 (Mail, Web..): ~2GB
To this data, there comes 5TB Traffic between the Web-/Mail-Server and the MySQL-Server. The MySQL-Server sends over ~5 GB each Hour out.
The Mysql-Server use now 80% from 32GB Ram. And the System-Load is in average on 1.20 the Output from the MySQL is now gziped.
The WebServer is using not full of 9GB Ram and the System-Load is under 1 (thanks nginx). The open Connections are ~7000
In comparison, many values fell down. But this comes through optimization and compressions.