OpenJDK G1GC

场景： 生产环境k8s 容器 jdk 版本为 OpenJDK 1.8 程序部署启动时 出现如下的警告信息：

OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=N

解决方案：

内因： 

As described in JEP 248, in JDK 9 the default garbage collector will switch from Parallel Garbage Collector (Parallel GC) to G1 Garbage Collector (G1GC).

启动时加入 -XX:ParallelGCThreads=N  参数