JVM G1 FinalReference很多时间

Question

从此日志中可以看出，FinalReference需要很多时间。

 2018-07-27T18:14:33.101+0800: 38.263: [GC pause (G1 Evacuation Pause) (young)38.278: [SoftReference, 0 refs, 0.0004133 secs]38.279: [WeakReference, 232 refs, 0.0002595 secs]38.279: [FinalReference, 481 refs, 0.0938618 secs]38.373: [PhantomReference, 0 refs, 1 refs, 0.0003031 secs]38.373: [JNI Weak Reference, 0.0000113 secs], 0.1118731 secs]
       [Parallel Time: 15.0 ms, GC Workers: 4]
          [GC Worker Start (ms): Min: 38263.1, Avg: 38263.9, Max: 38266.1, Diff: 3.0]
          [Ext Root Scanning (ms): Min: 0.0, Avg: 1.7, Max: 2.5, Diff: 2.5, Sum: 6.7]
          [Update RS (ms): Min: 1.9, Avg: 2.4, Max: 2.7, Diff: 0.8, Sum: 9.5]
             [Processed Buffers: Min: 8, Avg: 37.2, Max: 91, Diff: 83, Sum: 149]
          [Scan RS (ms): Min: 0.5, Avg: 0.8, Max: 1.2, Diff: 0.7, Sum: 3.4]
          [Code Root Scanning (ms): Min: 0.0, Avg: 0.6, Max: 2.3, Diff: 2.3, Sum: 2.5]
          [Object Copy (ms): Min: 7.1, Avg: 8.6, Max: 9.2, Diff: 2.1, Sum: 34.2]
          [Termination (ms): Min: 0.0, Avg: 0.1, Max: 0.1, Diff: 0.1, Sum: 0.3]
          [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
          [GC Worker Total (ms): Min: 11.9, Avg: 14.2, Max: 14.9, Diff: 3.0, Sum: 56.7]
          [GC Worker End (ms): Min: 38278.0, Avg: 38278.0, Max: 38278.0, Diff: 0.0]
       [Code Root Fixup: 0.2 ms]
       [Code Root Purge: 0.0 ms]
       [Clear CT: 0.2 ms]
       [Other: 96.5 ms]
          [Choose CSet: 0.0 ms]
          [Ref Proc: 95.1 ms]
          [Ref Enq: 0.1 ms]
          [Redirty Cards: 0.2 ms]
          [Humongous Reclaim: 0.0 ms]
          [Free CSet: 0.1 ms]
       [Eden: 262.0M(262.0M)->0.0B(262.0M) Survivors: 38.0M->38.0M Heap: 716.0M(4096.0M)->546.0M(4096.0M)]
     [Times: user=0.37 sys=0.03, real=0.11 secs] 

jvm选项如下

$ JAVA_HOME / bin / java -Dfile.encoding = utf-8-服务器-XX：+ UseCompressedOops -Xms4096m -Xmx4096m -XX：NewSize = 300m -XX：MaxNewSize = 300m -XX：+ UseG1GC -XX：+ PrintReferenceGC -XX：+ ParallelRefProcEnabled -XX：MaxGCPauseMillis = 100 -Xloggc：/data/dataLogs/gc/gc.log -verbose：gc -XX：+ PrintGCDateStamps -XX：+ PrintGCDetails -XX：+ DisableExplicitGC -XX：+ HeapDumpOnOutOfMemoryError -XX ：HeapDumpPath = / data / dataLogs / dump -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl = false -Dcom.sun.management.jmxremote.authenticate = false com.xx.ServerApp> / data / logs / stdout date +"%Y%m%d%H%M%S"。日志2>＆1＆

怎么了？