With microservices, cloud hosting, and vertical scaling in mind, we'll compare the top Java garbage collectors to see how efficiently they handle memory resources. Being configured smartly, Java can be cost-effective for all ranges of projects — from cloud-native startups to legacy enterprise applications. And the selected garbage collection algorithm is one of the main foundational bricks here, as its settings can influence the whole project. In this presentation, we share our experiences in tuning RAM usage in a Java process to make it more elastic and gain the benefits of faster scaling and lower total cost of ownership (TCO). The provided results of testing G1, Parallel, ConcMarkSweep, Serial, Shenandoah, ZGC, C4 and OpenJ9 garabage collectors while scaling Java applications vertically will help you to make the right choice for own projects.