Currently, blocklist.de has the following Stats/User:
Daily Mails: ~541630
Web-Traffic: ~98 GB
RBL-/API-Traffic: ~140 GB
Mail (In/Out)-Traffic: ~424 GB
Traffic over IPv6 (Mail, Web..): ~2GB
To this data, there comes 6TB Traffic between the Web-/Mail-Server and the MySQL-Server. The MySQL-Server sends over ~7 GB each Hour out.
The Mysql-Server use now 65% from 32GB Ram. And the System-Load is in average on 0.60 (after the last maintance with partitions for each week).
The WebServer is using not full of 5GB Ram and the System-Load is under 1 (thanks nginx). The open Connections are ~8000