On one of my nginx boxes currently running as a reverse proxy caching server server (using proxy_cache) I am seeing the number of Active Connections and Waiting connections increasing over time and never decreasing. These increases go up in steps over time and reach 50k connections before I am forced to restart the Nginx process.

nginx version: nginx/0.7.67
OS: Debian Lenny

Has anyone else seen this behavior or could help me explain it?

Thanks,

Davent