G1 XX:MaxGCPauseMillis 貌似没有起作用
待检查的参数
58.300s][info][gc,start ] GC(9) Pause Young (Concurrent Start) (G1 Evacuation Pause)
[58.300s][info][gc,task ] GC(9) Using 4 workers of 4 for evacuation
[58.352s][info][gc,mmu ] GC(9) MMU target violated: 31.0ms (30.0ms/31.0ms)
[58.352s][info][gc,phases ] GC(9) Pre Evacuate Collection Set: 0.3ms
[58.352s][info][gc,phases ] GC(9) Evacuate Collection Set: 49.9ms
[58.352s][info][gc,phases ] GC(9) Post Evacuate Collection Set: 1.2ms
[58.352s][info][gc,phases ] GC(9) Other: 0.2ms
[58.352s][info][gc,heap ] GC(9) Eden regions: 35->0(34)
[58.352s][info][gc,heap ] GC(9) Survivor regions: 3->4(8)
[58.352s][info][gc,heap ] GC(9) Old regions: 12->12
[58.352s][info][gc,heap ] GC(9) Humongous regions: 9->4
[58.352s][info][gc,metaspace ] GC(9) Metaspace: 256244K->256244K(749568K)
[58.352s][info][gc ] GC(9) Pause Young (Concurrent Start) (G1 Evacuation Pause) 929M->292M(1536M) 51.706ms
[58.352s][info][gc,cpu ] GC(9) User=0.13s Sys=0.03s Real=0.05s
几乎每一次都会产mmu，重新分配内存大小
