WTF. Pure-FTPd uses WAY TOO HIGH processor cycles. <_<
The server’s CPU usage gone like 90% just for pure-ftpd processes. So I decided to uninstall it and replace with vsftpd… and the CPU usage is now topped at 20% on vsftpd.
Conclusion: Pure-FTPd sucks (or perhaps it’s my system’s configuration. Whatever, lol).
PS: <3 Chihiro.