What Is: Useg1Gc

Key Command Line Switches. -XX:+UseG1GC – Tells the JVM to use the G1 Garbage collector. -XX:MaxGCPauseMillis=200 – Sets a target for the maximum GC pause time. This is a soft goal, and the JVM will make its best effort to achieve it. Therefore, the pause time goal will sometimes not be met.

How does G1 GC work?

So, what is the G1GC? The “Garbage-first” garbage collector, aka G1, is a concurrent multi-threaded GC. … The amount of live data in each region is tracked, and when a collection is triggered the G1GC will clear the ones with the most ‘garbage’ first – hence the name.

Which garbage collector is best in Java?

Executive summary. For your convenience, I’ve compared each Garbage Collector type to the default in Java 8 (Parallel GC). The results are clear: That default (Parallel GC) is the fastest.