How to check which garbage collection algorithm is used by jvm (Java Virtual Machine)?

  Under Linux, how to check which garbage collection algorithm the Java virtual machine uses? The method is relatively simple, the statement is as follows:

[testuser@vmtest]$ java -XX:+PrintCommandLineFlags -version
-XX:InitialHeapSize=128150272 -XX:MaxHeapSize=2050404352 -XX:+PrintCommandLineFlags -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseParallelGC 
openjdk version "1.8.0_181"
OpenJDK Runtime Environment (build 1.8.0_181-b13)
OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)

  The -XX:+UseParallelGC in the above result indicates that the new generation uses ParallelGC.

  Article reference:

• How to check the algorithm of JVM garbage collection