Java 11 GC日志记录
Java 11 GC日志记录
提问于 2020-07-14 22:06:37
我有一个运行java 11的应用程序，并启用了gc日志记录。我每隔5/6秒就会在GC日志中看到下面的几行。这是否意味着GC每5秒运行一次？
[2020-07-14T10:01:14.789-0400][gc,start ] GC(353) Pause Young (Normal) (G1 Evacuation Pause)
[2020-07-14T10:01:14.789-0400][gc,task ] GC(353) Using 8 workers of 8 for evacuation
[2020-07-14T10:01:14.790-0400][gc,phases ] GC(353) Pre Evacuate Collection Set: 0.0ms
[2020-07-14T10:01:14.790-0400][gc,phases ] GC(353) Evacuate Collection Set: 0.6ms
[2020-07-14T10:01:14.790-0400][gc,phases ] GC(353) Post Evacuate Collection Set: 0.5ms
[2020-07-14T10:01:14.790-0400][gc,phases ] GC(353) Other: 0.3ms
[2020-07-14T10:01:14.790-0400][gc,heap ] GC(353) Eden regions: 147->0(147)
[2020-07-14T10:01:14.790-0400][gc,heap ] GC(353) Survivor regions: 1->1(19)
[2020-07-14T10:01:14.790-0400][gc,heap ] GC(353) Old regions: 16->16
[2020-07-14T10:01:14.790-0400][gc,heap ] GC(353) Humongous regions: 1->1
[2020-07-14T10:01:14.790-0400][gc,metaspace ] GC(353) Metaspace: 43129K->43129K(1089536K)
[2020-07-14T10:01:14.791-0400][gc ] GC(353) Pause Young (Normal) (G1 Evacuation Pause) 163M->16M(248M) 1.689ms
[2020-07-14T10:01:14.791-0400][gc,cpu ] GC(353) User=0.00s Sys=0.01s Real=0.01s
[2020-07-14T10:01:20.411-0400][gc,start ] GC(354) Pause Young (Normal) (G1 Evacuation Pause)
[2020-07-14T10:01:20.411-0400][gc,task ] GC(354) Using 8 workers of 8 for evacuation
[2020-07-14T10:01:20.412-0400][gc,phases ] GC(354) Pre Evacuate Collection Set: 0.0ms
[2020-07-14T10:01:20.412-0400][gc,phases ] GC(354) Evacuate Collection Set: 0.6ms
[2020-07-14T10:01:20.412-0400][gc,phases ] GC(354) Post Evacuate Collection Set: 0.5ms
[2020-07-14T10:01:20.412-0400][gc,phases ] GC(354) Other: 0.3ms
[2020-07-14T10:01:20.412-0400][gc,heap ] GC(354) Eden regions: 147->0(147)
[2020-07-14T10:01:20.412-0400][gc,heap ] GC(354) Survivor regions: 1->1(19)
[2020-07-14T10:01:20.412-0400][gc,heap ] GC(354) Old regions: 16->16
[2020-07-14T10:01:20.412-0400][gc,heap ] GC(354) Humongous regions: 1->1
[2020-07-14T10:01:20.412-0400][gc,metaspace ] GC(354) Metaspace: 43129K->43129K(1089536K)
[2020-07-14T10:01:20.412-0400][gc ] GC(354) Pause Young (Normal) (G1 Evacuation Pause) 163M->16M(248M) 1.536ms
[2020-07-14T10:01:20.412-0400][gc,cpu ] GC(354) User=0.00s Sys=0.00s Real=0.00s
[2020-07-14T10:01:25.939-0400][gc,start ] GC(355) Pause Young (Normal) (G1 Evacuation Pause)
[2020-07-14T10:01:25.939-0400][gc,task ] GC(355) Using 8 workers of 8 for evacuation
[2020-07-14T10:01:25.940-0400][gc,phases ] GC(355) Pre Evacuate Collection Set: 0.0ms
[2020-07-14T10:01:25.940-0400][gc,phases ] GC(355) Evacuate Collection Set: 0.6ms
[2020-07-14T10:01:25.940-0400][gc,phases ] GC(355) Post Evacuate Collection Set: 0.5ms
[2020-07-14T10:01:25.940-0400][gc,phases ] GC(355) Other: 0.3ms
[2020-07-14T10:01:25.940-0400][gc,heap ] GC(355) Eden regions: 147->0(147)
[2020-07-14T10:01:25.940-0400][gc,heap ] GC(355) Survivor regions: 1->1(19)
[2020-07-14T10:01:25.940-0400][gc,heap ] GC(355) Old regions: 16->16
[2020-07-14T10:01:25.940-0400][gc,heap ] GC(355) Humongous regions: 1->1
[2020-07-14T10:01:25.940-0400][gc,metaspace ] GC(355) Metaspace: 43129K->43129K(1089536K)
[2020-07-14T10:01:25.940-0400][gc ] GC(355) Pause Young (Normal) (G1 Evacuation Pause) 163M->16M(248M) 1.537ms
[2020-07-14T10:01:25.940-0400][gc,cpu ] GC(355) User=0.01s Sys=0.00s Real=0.01s回答 1
Stack Overflow用户
回答已采纳
发布于 2020-07-14 23:01:51
是的，确实如此。这也意味着你的应用程序被停止了大约1.5 ms的GC工作。具体地说，它清理年轻一代的区域。这很正常，没什么好担心的。
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原文链接：
https://stackoverflow.com/questions/62897054
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