jvm gc日志解读

参考 https://blog.csdn.net/yxc135/article/details/12137663 认识gc日志每个位置的含义

java 8 full gc

[Full GC (Metadata GC Threshold) [PSYoungGen: 15520K->0K(153088K)] [ParOldGen: 80K->14879K(349696K)] 15600K->14879K(502784K), [Metaspace: 20889K->20889K(1069056K)], 0.0524818 secs] [Times: user=0.07 sys=0.01, real=0.06 secs] 

java 7  full gc

[Full GC (System) [PSYoungGen: 320K->0K(9408K)] [ParOldGen: 0K->222K(49664K)] 320K->222K(59072K) [PSPermGen: 2458K->2456K(21248K)], 0.0095710 secs] [Times: user=0.02 sys=0.00, real=0.00 secs]