"CGC"的含义是什么?和"CGCT"；在JDK11中是否为"jstat -gc< PID>"? [英] What's the meaning of "CGC" and "CGCT" in JDK11 "jstat -gc <PID>"?

问题描述

有两个项目，分别称为CGC和CGCT.我找不到描述其含义的文档和手册页.

There are two items called CGC and CGCT. I cannot found the documention and man page describing their meaning.

# jstat -gc 139934
 S0C    S1C    S0U    S1U      EC       EU        OC         OU       MC     MU    CCSC   CCSU   YGC     YGCT    FGC    FGCT    CGC    CGCT     GCT   
 0.0   15360.0  0.0   15360.0 113664.0  9216.0   88064.0    23552.0   82304.0 80084.2 10112.0 9360.4     10    0.157   0      0.000   6      0.018    0.175

# java -version 
openjdk version "11.0.2" 2019-01-15 LTS
OpenJDK Runtime Environment Corretto-11.0.2.9.3 (build 11.0.2+9-LTS)
OpenJDK 64-Bit Server VM Corretto-11.0.2.9.3 (build 11.0.2+9-LTS, mixed mode

我使用了默认的jvm参数.

I used the default jvm arguments.

#jhsdb jmap --heap --pid 139934 | grep GC
Garbage-First (G1) GC with 13 thread(s)

推荐答案

据我了解，链接，CGC和CGCT中的第一个C代表并发"，因此基于

As far as I understand from this link, the first C in CGC and CGCT stands for "concurrent", so based on the description from the docs for GC and GCT:

GCT: Total garbage collection time.

我会说CGTC是并发垃圾收集"，而CGC是并发垃圾收集".

I would say CGTC is "Concurrent Total Garbage Collection" and CGC is "Concurrent Garbage Collection".

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