Containers have been used in a growing number of production environments as evidenced by over 300 New Relic customer accounts activating Docker monitoring beta with an aggregate of 40,000 to 60,000 containers daily and more than 2 million containers since the private beta program began. Data suggests that containers are being used for both medium lifespan servers (cattle) and net new application architectures using containers for periods of time far less than traditional virtual machines (servers as bacteria). The use cases vary widely among companies and unique software challenges, indicating that there is no one single solution to cater to the entire Docker market. The analysis highlights the importance of monitoring performance metrics specific to container usage, such as behavior of container types instead of traditional virtual machine metrics. As the technology continues to evolve, it will have significant implications for software development and monitoring.