Seems like the Applications Performance Monitoring landscape has changed since last time I looked, here’s some links, including a route to the Gartner Report.
- http://apmblog.dynatrace.com/2014/05/29/a-fond-farewell-to-optier/
- http://blogs.gartner.com/jonah-kowall/2014/05/23/two-rise-and-two-fall-the-story-of-application-performance-monitoring-apm/
- https://www.appdynamics.com/, they publish the Gartner MQ on APM (2015)
- The Gartner MQ on APM.
- Otherwise Gartner on APM
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