Is there a guide to the various GC algorithms? Suppose I'm running an app where pause times don't matter, and I want throughout or reduced memory usage. How much more of this will I get by switching to another GC algorithm? 2%? 20%? 40%?
Each JVM implementation (Azul, IBM, OpenJDK, PTC, Aicas,...) has their own collection of GC algorithms.
And their behaviour depends pretty much on the application as well.
Do you want to optimise pause times? Use X. Optimise throughput without regard to pause times? Use Y. Optimise memory use? Use Z.
It may not be accurate in every case (no guideline is), but it would be a good starting point for the vast majority of us who don't know the pros and cons of various collectors.
https://docs.oracle.com/javase/10/gctuning/introduction-garb...
https://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/gen...
https://www.infoq.com/articles/G1-One-Garbage-Collector-To-R...
https://www.infoq.com/articles/tuning-tips-G1-GC
https://developer.ibm.com/articles/garbage-collection-tradeo...
https://www-01.ibm.com/support/docview.wss?uid=swg27013824&a...