This month, Jason Crome is giving a talk on using Fluentd for logging, and Perl for analytics:

Logging is one of the most important pieces you’ll have in any large-scale software system, and in a massively multiplayer game it’s even more critical. Using Ovid’s Veure MMO as an example, I’ll discuss what we are logging and why, how we use fluentd to collect information at all levels in the game’s stack, and the tools and processes we use to analyze that data.

RSVP on the Chicago.PM Meetup

EDIT: Slides for Logging and Analytics Using Perl and Fluentd have been posted to cromedome's Slideshare