GC log while-true

Java HotSpot(TM) Client VM (25.121-b13) for windows-x86 JRE (1.8.0_121-b13), built on Dec 12 2016 18:17:00 by "java_re" with MS VC++ 10.0 (VS2010)
Memory: 4k page, physical 3142848k(786592k free), swap 7854604k(3579436k free)
CommandLine flags: -XX:InitialHeapSize=16777216 -XX:MaxHeapSize=268435456 -XX:+PrintGC -XX:+PrintGCTimeStamps -XX:-UseLargePagesIndividualAllocation
0.286: [GC (Allocation Failure)  4416K->3499K(15872K), 0.0184208 secs]
0.338: [GC (Allocation Failure)  7915K->7436K(15872K), 0.0262836 secs]
0.393: [GC (Allocation Failure)  11483K->10979K(15872K), 0.0191781 secs]
0.454: [GC (Allocation Failure)  15395K->15394K(19884K), 0.0223692 secs]
0.476: [Full GC (Allocation Failure)  15394K->15394K(19884K), 0.0883000 secs]
0.933: [GC (Allocation Failure)  25003K->25003K(36192K), 0.0625810 secs]
1.146: [GC (Allocation Failure)  35051K->35050K(45216K), 0.0487512 secs]
1.195: [Full GC (Allocation Failure)  35050K->33643K(45216K), 0.1729852 secs]
1.721: [GC (Allocation Failure)  56235K->56234K(81420K), 0.1193029 secs]
2.013: [GC (Allocation Failure)  78826K->78825K(101532K), 0.1078892 secs]
2.121: [Full GC (Allocation Failure)  78825K->75660K(101532K), 0.4024693 secs]
3.340: [GC (Allocation Failure)  126220K->126219K(182936K), 0.2696810 secs]
3.977: [GC (Allocation Failure)  176779K->176778K(227412K), 0.2492202 secs]
4.226: [Full GC (Allocation Failure)  176778K->161234K(227412K), 0.9294628 secs]
6.729: [Full GC (Allocation Failure)  231186K->220502K(253440K), 1.5362384 secs]
9.480: [Full GC (Allocation Failure)  253440K->253439K(253440K), 1.4712870 secs]
11.357: [Full GC (Allocation Failure)  253439K->253439K(253440K), 1.3464600 secs]
12.704: [Full GC (Allocation Failure)  253439K->253424K(253440K), 1.5723675 secs]
14.277: [Full GC (Allocation Failure)  253439K->253439K(253440K), 1.3337789 secs]
15.611: [Full GC (Allocation Failure)  253439K->253439K(253440K), 1.3165345 secs]
16.929: [Full GC (Allocation Failure)  253440K->156641K(253440K), 1.0331278 secs]