The performance team at Etsy has recently developed a number of new alerting tools to help us discover and dig into performance regressions across the site. We built these new tools on top of existing technology (Nagios and Nagios Herald) to bring added context to site slowdowns and help us fix regressions more quickly.
These new alerts change the conversation with our coworkers. Before, we’d ask people about regressions long after they occurred. Now, we discover regressions almost immediately, and are able to share context such as graphs and recent site changes, as we work with other teams to track down and fix regressions.