GC log example: G1 garbage collector

Java HotSpot(TM) 64-Bit Server VM (25.144-b01) for bsd-amd64 JRE (1.8.0_144-b01), built on Jul 21 2017 22:07:42 by "java_re" with gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
Memory: 4k page, physical 16777216k(142652k free)

/proc/meminfo:

CommandLine flags: -XX:InitialHeapSize=10485760 -XX:MaxHeapSize=10485760 -XX:MaxNewSize=5242880 -XX:NewSize=5242880 -XX:+PrintFlagsFinal -XX:+PrintGC -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseG1GC
15.460: [GC pause (G1 Humongous Allocation) (young) (initial-mark), 0.0029677 secs]
   [Parallel Time: 2.0 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 15460.6, Avg: 15460.7, Max: 15460.8, Diff: 0.3]
      [Ext Root Scanning (ms): Min: 0.5, Avg: 0.6, Max: 0.7, Diff: 0.3, Sum: 5.0]
      [Update RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
         [Processed Buffers: Min: 0, Avg: 0.0, Max: 0, Diff: 0, Sum: 0]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Object Copy (ms): Min: 0.7, Avg: 0.7, Max: 0.8, Diff: 0.1, Sum: 5.9]
      [Termination (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
         [Termination Attempts: Min: 1, Avg: 2.4, Max: 5, Diff: 4, Sum: 19]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.1, Max: 0.1, Diff: 0.1, Sum: 0.5]
      [GC Worker Total (ms): Min: 1.3, Avg: 1.4, Max: 1.6, Diff: 0.3, Sum: 11.5]
      [GC Worker End (ms): Min: 15462.1, Avg: 15462.1, Max: 15462.2, Diff: 0.1]
   [Code Root Fixup: 0.0 ms]
   [Code Root Purge: 0.0 ms]
   [Clear CT: 0.2 ms]
   [Other: 0.8 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 0.4 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 0.2 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.0 ms]
   [Eden: 1024.0K(5120.0K)->0.0B(4096.0K) Survivors: 0.0B->1024.0K Heap: 3000.1K(10.0M)->2520.1K(10.0M)]
 [Times: user=0.01 sys=0.00, real=0.01 secs]
15.463: [GC concurrent-root-region-scan-start]
15.464: [GC concurrent-root-region-scan-end, 0.0006827 secs]
15.464: [GC concurrent-mark-start]
15.464: [GC concurrent-mark-end, 0.0000486 secs]
15.464: [GC remark 15.465: [Finalize Marking, 0.0002166 secs] 15.465: [GC ref-proc, 0.0002024 secs] 15.465: [Unloading, 0.0010383 secs], 0.0017579 secs]
 [Times: user=0.01 sys=0.00, real=0.00 secs]
15.466: [GC cleanup 3544K->3544K(10M), 0.0008216 secs]
 [Times: user=0.00 sys=0.00, real=0.00 secs]
25.473: [GC pause (G1 Humongous Allocation) (young), 0.0015687 secs]
   [Parallel Time: 0.7 ms, GC Workers: 8]
      [GC Worker Start (ms): Min: 25472.9, Avg: 25473.0, Max: 25473.1, Diff: 0.2]
      [Ext Root Scanning (ms): Min: 0.1, Avg: 0.2, Max: 0.3, Diff: 0.2, Sum: 1.5]
      [Update RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
         [Processed Buffers: Min: 0, Avg: 0.0, Max: 0, Diff: 0, Sum: 0]
      [Scan RS (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Code Root Scanning (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
      [Object Copy (ms): Min: 0.3, Avg: 0.4, Max: 0.4, Diff: 0.0, Sum: 3.0]
      [Termination (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.0]
         [Termination Attempts: Min: 1, Avg: 4.2, Max: 7, Diff: 6, Sum: 34]
      [GC Worker Other (ms): Min: 0.0, Avg: 0.0, Max: 0.0, Diff: 0.0, Sum: 0.1]
      [GC Worker Total (ms): Min: 0.5, Avg: 0.6, Max: 0.7, Diff: 0.2, Sum: 4.7]
      [GC Worker End (ms): Min: 25473.6, Avg: 25473.6, Max: 25473.6, Diff: 0.0]
   [Code Root Fixup: 0.0 ms]
   [Code Root Purge: 0.0 ms]
   [Clear CT: 0.2 ms]
   [Other: 0.6 ms]
      [Choose CSet: 0.0 ms]
      [Ref Proc: 0.4 ms]
      [Ref Enq: 0.0 ms]
      [Redirty Cards: 0.2 ms]
      [Humongous Register: 0.0 ms]
      [Humongous Reclaim: 0.0 ms]
      [Free CSet: 0.0 ms]
   [Eden: 0.0B(4096.0K)->0.0B(4096.0K) Survivors: 1024.0K->1024.0K Heap: 4568.1K(10.0M)->4580.2K(10.0M)]
 [Times: user=0.00 sys=0.00, real=0.00 secs]
25.475: [Full GC (Allocation Failure)  4580K->4424K(10M), 0.0027772 secs]
   [Eden: 0.0B(4096.0K)->0.0B(5120.0K) Survivors: 1024.0K->0.0B Heap: 4580.2K(10.0M)->4424.1K(10.0M)], [Metaspace: 2725K->2725K(1056768K)]
 [Times: user=0.01 sys=0.00, real=0.00 secs]
25.477: [Full GC (Allocation Failure)  4424K->4424K(10M), 0.0020005 secs]
   [Eden: 0.0B(5120.0K)->0.0B(5120.0K) Survivors: 0.0B->0.0B Heap: 4424.1K(10.0M)->4424.1K(10.0M)], [Metaspace: 2725K->2725K(1056768K)]
 [Times: user=0.00 sys=0.00, real=0.00 secs]
Heap
 garbage-first heap   total 10240K, used 4424K [0x00000007bf600000, 0x00000007bf700050, 0x00000007c0000000)
  region size 1024K, 1 young (1024K), 0 survivors (0K)
 Metaspace       used 2757K, capacity 4486K, committed 4864K, reserved 1056768K
  class space    used 297K, capacity 386K, committed 512K, reserved 1048576K