JVM常见垃圾回收器组合参数设定（JDK6 To JDK14）

Serial 串行收集器

# 新生代 Serial (DefNew) + 老年代 Serial Old
-XX:+UseSerialGC

小型程序。默认情况下不会是这种选项，HotSpot会根据计算及配置和JDK版本自动选择收集器

Parallel 并行收集器

# 新生代 ParallelScavenge + 老年代 ParallelOld  (JDK7,  JDK8 为默认垃圾回收器) 
-XX:+UseParallelGC
# 新生代 ParallelScavenge + 老年代 ParallelOld, 同上 
-XX:+UseParallelOldGC
# 新生代 ParallelScavenge + 老年代 SerialOld   ，JDK14 开始弃用 
-XX:+UseParallelGC  -XX:-UseParallelOldGC

• JDK14 开始弃用 ParallelScavenge + SerialOld 组合，https://openjdk.java.net/jeps/366

ParNew + SerialOld 收集器

# 新生代 ParNew + 老年代 SerialOld
-XX:+UseParNewGC

• JDK9 : Various GC combinations have now been removed : http://bugs.java.com/view_bug.do?bug_id=JDK-8044022

The GC combinations that were deprecated in JDK 8 have now been removed. This means that the following GC combinations no longer exist: - DefNew + CMS - ParNew + SerialOld - Incremental CMS The "foreground" mode for CMS has also been removed.

• https://stackoverflow.com/questions/34962257/why-remove-support-for-parnewserialold-anddefnewcms-in-the-future

CMS 收集器

# 新生代 ParNew + 老年代 CMS + 老年代 Serial Old
# 某些版本的参数是这样的： -XX:+UseConcurrentMarkSweepGC
-XX:+UseConcMarkSweepGC

• JEP 363 Remove the Concurrent Mark and Sweep (CMS) Garbage Collector： https://openjdk.java.net/jeps/363 (JDK14)

G1 收集器

# JDK 10, 11, 13 为默认垃圾回收器
-XX:+UseG1GC

ZGC 收集器

-XX:+UnlockExperimentalVMOptions -XX:+UseZGC

• https://wiki.openjdk.java.net/display/zgc
• JEP 333 ZGC A Scalable Low-Latency Garbage Collector (Experimental) ： http://openjdk.java.net/jeps/333 (JDK11)
• JEP 365 ZGC on Windows ： https://openjdk.java.net/jeps/365 (JDK14)
• JDK14 JEP 364 ZGC on macOS ： https://openjdk.java.net/jeps/364 (JDK14)

Epsilon 收集器

-XX:+UseEpsilonGC

• JEP 318 Epsilon, A No-Op Garbage Collector ： http://openjdk.java.net/jeps/318

Shenandoah 收集器

-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC

• https://wiki.openjdk.java.net/display/shenandoah
• JEP 189: Shenandoah: A Low-Pause-Time Garbage Collector (Experimental) http://openjdk.java.net/jeps/189 (JDK12)

by Sven Augustus https://my.oschina.net/langxSpirit