先贴段GC 日志出来：
33.125: [GC [DefNew: 3324->152 (3712k), 0.0025925 secs] 3324K-> 152K(11904K), 0.0031682 secs]
100.667: [Full GC [Tenured: 0K-> 210K(1024K), 0.0149142 secs] 4603K->210K(19456K), [Perm : 2999K-> 2999K(21248)], 0.0150007 secs] [Times: user=0.01 sys=0.00, real=0.02 secs]