We're running Rails 2.1 on Ruby 1.8.6-p114. Our mongrel_rails processes keep growing slowly, but steadily. We're running 14 mongrels with 1.7 GB RAM, so when a mongrel starts to use over 100MB we're getting tight on memory.

The process starts out with 45MB, goes to 60MB quickly, then slowly keeps growing, about 2MB per hour (about 5 req/min for each mongrel, not much load).

Anybody else have this problem? Anybody running without any memory increase?