Spring I/O 2023 - Barcelona, 18-19 May Slides: https://www.ginnieandfifounet.com/jpb/slides/Mastering%20GC_%20tame%20the%20beast%20and%20make%20it%20your%20best%20ally.pdf This talk discuss advantages and limits of each GC (G1, Serial, Parallel, Z & Shenandoah) to choose the one that fits according to the type of applications We discuss in detail how to tune GC depending on the case: Which GC to use for a batch oriented application? How to tune GC to maximise time to process data and optimize resources? Which GC for user request/response applications more latency sensitive? What is the difference between Z and Shenandoah? How to size to take best advantage of them? G1: What are the issues (RememberSet, Humongous, Young gen resize, …)? How to tune it correctly depending on your resources?