May SF Metrics Meetup!
Details
Time Series Visualization
Mike Bostock (https://github.com/mbostock) - Square (https://squareup.com/)
Designing effective visualizations for time series data is more
difficult than it looks. Many existing tools do not follow best
practices, and as a result poorly facilitate insight. This talk will
discuss common pitfalls and present various techniques for better
presentation and exploration of metrics in modern browsers.
Digging Deep with ActiveSupport::Notifications
Matt Sanders (https://github.com/nextmat) - Librato (http://metrics.librato.com)
Rails 3 and above includes a powerful instrumentation system, ActiveSupport::Notifications, which can be used to track performance and event information for all aspects of your application. Notifications are light-weight, easy to setup, and can be consumed by multiple subscribers(logs, audit trails, consolidated metrics, other parts of your application).