Velocity - Though it is heavy on the web side of things I find it to have great speakers covering good material for anyone interested in performance, scaling, metrics, monitoring, and operations in general.
Some of the Velocity 2011 Topics and Themes include:
- NoSQL
- Mobile performance
- Effective cloud computing
- JavaScript speedups
- TCP, HTTP, and SSL optimizations
- Metrics and monitoring
- Impact on the bottom line
O'Reilly Velocity happens June 14-16, 2011