4

jvm 崩溃时我得到了一个 javacore，但我无法理解 GC 历史记录段。LocalGC/GlobalGC/SystemGC 代表什么？非常感谢！

1STGCHTYPE GC历史  
3STHSTTYPE 06:49:48:918796000 GMT j9mm.60 - 类卸载开始
3STHSTTYPE 06:49:48:918781000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:49:48:912430000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:49:48:912413000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:49:48:872687000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:49:48:872660000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2853 soft=1164 phantom=20 finalizers=384 globalcount=231 scavengecount=397
3STHSTTYPE 06:49:48:872300000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.073 newspace=4022424/60397568 oldspace=981846840/1006632960 loa=50331648/50331648
3STHSTTYPE 06:49:22:649438000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90138 flipbytes=5837752 newspace=54236992/60397568 oldspace= 981848832/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:22:637242000 GMT j9mm.64 - LocalGC 开始：globalcount=230 scavengecount=397 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:22:637218000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:21:424334000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=88056 flipbytes=5740288 newspace=54540368/60397568 oldspace= 981935408/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:21:395216000 GMT j9mm.64 - LocalGC 开始：globalcount=230 scavengecount=396 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:21:395186000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:20:118355000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=89809 flipbytes=5913320 newspace=54403616/6039=7568 oldspace 982408904/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:20:89486000 GMT j9mm.64 - LocalGC 开始：globalcount=230 scavengecount=395 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:20:89455000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:18:876887000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90096 flipbytes=5943112 newspace=54281264/60397568 oldspace= 982614504/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:18:862146000 GMT j9mm.64 - LocalGC 开始：globalcount=230 scavengecount=394 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:18:862121000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:17:692277000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90207 flipbytes=5949208 newspace=54112984/60397568 oldspace= 982793112/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:17:670489000 GMT j9mm.64 - LocalGC 开始： globalcount=230 scavengecount=393 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:17:670464000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:16:455289000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90332 flipbytes=5952640 newspace=54113200/60397568 oldspace= 982975872/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:16:433555000 GMT j9mm.64 - LocalGC 开始： globalcount=230 scavengecount=392 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:16:433529000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:15:304510000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90287 flipbytes=5947072 newspace=54283360/60397568 oldspace= 983168536/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:15:283058000 GMT j9mm.64 - LocalGC 开始： globalcount=230 scavengecount=391 weakrefs=2840 soft=1158 phantom=20 finalizers=376
3STHSTTYPE 06:49:15:283032000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:13:959191000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90616 flipbytes=5964184 newspace=54011616/60269568 oldspace= 983360752/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:13:945970000 GMT j9mm.64 - LocalGC 开始： globalcount=230 scavengecount=390 weakrefs=2840 soft=1162 phantom=20 finalizers=378
3STHSTTYPE 06:49:13:945946000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:49:12:907889000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=90406 flipbytes=5767016 newspace=53103184/59038720 oldspace= 983591256/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:49:12:893607000 GMT j9mm.64 - LocalGC 开始：globalcount=230 scavengecount=389 weakrefs=2846 soft=1165 phantom=20 finalizers=403
3STHSTTYPE 06:49:12:893581000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:48:48:870649000 GMT j9mm.51 - SystemGC 结束：newspace=57301424/60397568 oldspace=983842608/1006632960 loa=50331648/50331648
3STHSTTYPE 06:48:48:870622000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2846 soft=1148 phantom=20 finalizers=376 newspace=57301424/60397568 oldspace=983842608/1006632960/503 loa=3163831
3STHSTTYPE 06:48:48:870543000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:48:48:864220000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:48:48:864208000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:48:48:809822000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:48:48:809795000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2850 soft=1264 phantom=20 finalizers=384 globalcount=230 scavengecount=388
3STHSTTYPE 06:48:48:809430000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.077 newspace=9527800/60397568 oldspace=983755144/1006632960 loa=50331648/50331648
3STHSTTYPE 06:47:48:808722000 GMT j9mm.51 - SystemGC 结束：newspace=57401760/60397568 oldspace=983759440/1006632960 loa=50331648/50331648
3STHSTTYPE 06:47:48:808694000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2846 soft=1162 phantom=20 finalizers=376 newspace=57401760/60397568 oldspace=983759440/1006632960/503 loa=3163831
3STHSTTYPE 06:47:48:808616000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:47:48:802436000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:47:48:802423000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:47:48:746999000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:47:48:746972000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2850 soft=1220 phantom=20 finalizers=380 globalcount=229 scavengecount=388
3STHSTTYPE 06:47:48:746605000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.074 newspace=33698008/60397568 oldspace=983693288/1006632960 loa=50331648/50331648
3STHSTTYPE 06:47:06:502600000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=40139 flipbytes=3022592 newspace=57224568/60397568 oldspace= 983693336/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:47:06:491846000 GMT j9mm.64 - LocalGC 开始：globalcount=228 scavengecount=388 weakrefs=2845 soft=1240 phantom=20 finalizers=387
3STHSTTYPE 06:47:06:491822000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:46:48:746220000 GMT j9mm.51 - SystemGC 结束：newspace=57167480/60397568 oldspace=983884056/1006632960 loa=50331648/50331648
3STHSTTYPE 06:46:48:746192000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2838 soft=1168 phantom=20 finalizers=374 newspace=57167480/60397568 oldspace=983884056/10066329608/5031=3163831
3STHSTTYPE 06:46:48:746104000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:46:48:741406000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:46:48:741392000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:46:48:697422000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:46:48:697395000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2838 soft=1176 phantom=20 finalizers=377 globalcount=228 scavengecount=387
3STHSTTYPE 06:46:48:697043000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.067 newspace=47752152/60397568 oldspace=983878128/1006632960 loa=50331648/50331648
3STHSTTYPE 06:45:48:694718000 GMT j9mm.51 - SystemGC 结束：newspace=57327272/60397568 oldspace=983878176/1006632960 loa=50331648/50331648
3STHSTTYPE 06:45:48:694692000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2838 soft=1173 phantom=20 finalizers=374 newspace=57327272/60397568 oldspace=983878176/1006632946/50313163831
3STHSTTYPE 06:45:48:694601000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:45:48:688358000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:45:48:688344000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:45:48:633645000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:45:48:633618000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2878 soft=1268 phantom=20 finalizers=386 globalcount=227 scavengecount=387
3STHSTTYPE 06:45:48:633260000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.075 newspace=30163040/60397568 oldspace=983836992/1006632960 loa=50331648/50331648
3STHSTTYPE 06:44:48:632920000 GMT j9mm.51 - SystemGC 结束：newspace=57252560/60397568 oldspace=983839584/1006632960 loa=50331648/50331648
3STHSTTYPE 06:44:48:632891000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2848 soft=1171 phantom=20 finalizers=376 newspace=57252560/60397568 oldspace=983839584/1006632946/50313163831
3STHSTTYPE 06:44:48:632802000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:44:48:628101000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:44:48:628087000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:44:48:575421000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:44:48:575393000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2852 soft=1227 phantom=20 finalizers=380 globalcount=226 scavengecount=387
3STHSTTYPE 06:44:48:575028000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.076 newspace=34103512/60397568 oldspace=983829536/1006632960 loa=50331648/50331648
3STHSTTYPE 06:43:48:565148000 GMT j9mm.51 - SystemGC 结束：newspace=57376224/60397568 oldspace=983829584/1006632960 loa=50331648/50331648
3STHSTTYPE 06:43:48:565121000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2834 soft=1173 phantom=20 finalizers=374 newspace=57376224/60397568 oldspace=983829584/1006632960/503 loa=3163831
3STHSTTYPE 06:43:48:565031000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:43:48:558842000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:43:48:558829000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:43:48:525392000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:43:48:525364000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2834 soft=1199 phantom=20 finalizers=381 globalcount=225 scavengecount=387
3STHSTTYPE 06:43:48:524995000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.083 newspace=36182232/60397568 oldspace=983808712/1006632960 loa=50331648/50331648
3STHSTTYPE 06:42:48:524638000 GMT j9mm.51 - SystemGC 结束：newspace=57386424/60397568 oldspace=983810240/1006632960 loa=50331648/50331648
3STHSTTYPE 06:42:48:524610000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2834 soft=1176 phantom=20 finalizers=374 newspace=57386424/60397568 oldspace=983810240/10066329608/5031=3163831
3STHSTTYPE 06:42:48:524523000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:42:48:518725000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:42:48:518712000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:42:48:464206000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:42:48:464178000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2834 soft=1216 phantom=20 finalizers=381 globalcount=224 scavengecount=387
3STHSTTYPE 06:42:48:463815000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.080 newspace=39931504/60397568 oldspace=983810192/1006632960 loa=50331648/50331648
3STHSTTYPE 06:41:48:454217000 GMT j9mm.51 - SystemGC 结束：newspace=57537296/60397568 oldspace=983810240/1006632960 loa=50331648/50331648
3STHSTTYPE 06:41:48:454190000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2834 soft=1176 phantom=20 finalizers=374 newspace=57537296/60397568 oldspace=983810240/10066329608/5031=3163831
3STHSTTYPE 06:41:48:454111000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:41:48:447998000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:41:48:447985000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:41:48:393305000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:41:48:393277000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2840 soft=1180 phantom=20 finalizers=375 globalcount=223 scavengecount=387
3STHSTTYPE 06:41:48:392909000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.081 newspace=52249608/60397568 oldspace=983787400/1006632960 loa=50331648/50331648
3STHSTTYPE 06:41:21:359379000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=41832 flipbytes=2898488 newspace=57385008/60397568 oldspace= 983787448/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:41:21:345579000 GMT j9mm.64 - LocalGC 开始：globalcount=222 scavengecount=387 weakrefs=2842 soft=1229 phantom=20 finalizers=384
3STHSTTYPE 06:41:21:345556000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:41:04:671043000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=68569 flipbytes=4083904 newspace=56170240/6039=7568 oldspace 984957880/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:41:04:661273000 GMT j9mm.64 - LocalGC 开始：globalcount=222 scavengecount=386 weakrefs=2840 soft=1179 phantom=20 finalizers=374
3STHSTTYPE 06:41:04:661250000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:41:03:789521000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=65831 flipbytes=3909376 newspace=56302368/60397568 oldspace 984957880/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:41:03:779410000 GMT j9mm.64 - LocalGC 开始：globalcount=222 scavengecount=385 weakrefs=2840 soft=1259 phantom=20 finalizers=381
3STHSTTYPE 06:41:03:779386000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:40:48:388752000 GMT j9mm.51 - SystemGC 结束：newspace=56524640/60397568 oldspace=984965784/1006632960 loa=50331648/50331648
3STHSTTYPE 06:40:48:388725000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2834 soft=1174 phantom=20 finalizers=374 newspace=56524640/60397568 oldspace=984965784/1006632960/50331668/5031
3STHSTTYPE 06:40:48:388635000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:40:48:382147000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:40:48:382133000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:40:48:327465000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:40:48:327437000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2848 soft=1380 phantom=20 finalizers=392 globalcount=222 scavengecount=384
3STHSTTYPE 06:40:48:327100000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.087 newspace=9458328/60397568 oldspace=984746256/1006632960 loa=50331648/50331648
3STHSTTYPE 06:39:48:326740000 GMT j9mm.51 - SystemGC 结束：newspace=56644528/60397568 oldspace=984750984/1006632960 loa=50331648/50331648
3STHSTTYPE 06:39:48:326711000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2844 soft=1176 phantom=20 finalizers=375 newspace=56644528/60397568 oldspace=984750984/1006632960/50313163831
3STHSTTYPE 06:39:48:326623000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:39:48:321384000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:39:48:321372000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:39:48:267053000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:39:48:267026000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2844 soft=1194 phantom=20 finalizers=377 globalcount=221 scavengecount=384
3STHSTTYPE 06:39:48:266665000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.087 newspace=50544576/60397568 oldspace=984643408/1006632960 loa=50331648/50331648
3STHSTTYPE 06:38:48:266051000 GMT j9mm.51 - SystemGC 结束：newspace=56680224/60397568 oldspace=984643456/1006632960 loa=50331648/50331648
3STHSTTYPE 06:38:48:266020000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0weakrefs=2838 soft=1182 phantom=20 finalizers=373 newspace=56680224/60397568 oldspace=984643456/10066329608/5031=3163831
3STHSTTYPE 06:38:48:265943000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:38:48:259764000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:38:48:259754000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:38:48:225660000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:38:48:225633000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2852 soft=1251 phantom=20 finalizers=378 globalcount=220 scavengecount=384
3STHSTTYPE 06:38:48:225289000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.087 newspace=29104864/60397568 oldspace=984623848/1006632960 loa=50331648/50331648
3STHSTTYPE 06:38:21:598485000 GMT j9mm.65 - LocalGC 结束：rememberedsetoverflow=0 引起rememberedsetoverflow=0 scancacheoverflow=0 failedflipcount=0 failedflipbytes=0 failedtenurecount=0 failedtenurebytes=0 flipcount=61526 flipbytes=3939664 newspace=56256360/60397568 oldspace= 984627960/1006632960 loa=50331648/50331648 任期=14
3STHSTTYPE 06:38:21:584740000 GMT j9mm.64 - LocalGC 开始：globalcount=219 scavengecount=384 weakrefs=2861 soft=1329 phantom=20 finalizers=386
3STHSTTYPE 06:38:21:584717000 GMT j9mm.63 - 设置清道夫退出标志 = false
3STHSTTYPE 06:37:48:224903000 GMT j9mm.51 - SystemGC 结束：newspace=56398880/60397568 oldspace=984627960/1006632960 loa=50331648/50331648
3STHSTTYPE 06:37:48:224875000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2849 soft=1185 phantom=20 finalizers=373 newspace=56398880/60397568 oldspace=984627960/1006632960/503 loa=3163831
3STHSTTYPE 06:37:48:224786000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:37:48:218806000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:37:48:218793000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:37:48:163746000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:37:48:163718000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2856 soft=1267 phantom=20 finalizers=382 globalcount=219 scavengecount=383
3STHSTTYPE 06:37:48:163343000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.085 newspace=12010848/60397568 oldspace=984587896/1006632960 loa=50331648/50331648
3STHSTTYPE 06:36:48:156116000 GMT j9mm.51 - SystemGC 结束：newspace=56649080/60397568 oldspace=984594952/1006632960 loa=50331648/50331648
3STHSTTYPE 06:36:48:156084000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0weakrefs=2839 soft=1186 phantom=19 finalizers=373 newspace=56649080/60397568 oldspace=984594952/1006632960/503 loa=3163831
3STHSTTYPE 06:36:48:156000000 GMT j9mm.57 - 扫描结束
3STHSTTYPE 06:36:48:148638000 GMT j9mm.56 - 扫描开始
3STHSTTYPE 06:36:48:148620000 GMT j9mm.55 - 标记结束
3STHSTTYPE 06:36:48:83794000 GMT j9mm.54 - 标记开始
3STHSTTYPE 06:36:48:83761000 GMT j9mm.52 - GlobalGC 开始：weakrefs=2862 soft=1387 phantom=19 finalizers=385 globalcount=218 scavengecount=383
3STHSTTYPE 06:36:48:83361000 GMT j9mm.50 - SystemGC 开始：exclusiveaccessms=0.108 newspace=2142152/60397568 oldspace=984581856/1006632960 loa=50331648/50331648
3STHSTTYPE 06:35:48:76369000 GMT j9mm.51 - SystemGC 结束：newspace=56774872/60397568 oldspace=984586272/1006632960 loa=50331648/50331648
3STHSTTYPE 06:35:48:76342000 GMT j9mm.53 - GlobalGC 结束：workstackoverflow=0 overflowcount=0 weakrefs=2848 soft=1184 phantom=19 finalizers=373 newspace=56774872/60397568 oldspace=984586272/1006632960/5038316 loa=5034316
4

1 回答 1

1

如果您在 IBM Java VM 上使用 gencon 分代垃圾收集器，则会看到此条目。

LocalGC 只收集 Nursery 空间，这是创建所有小对象的空间。这也称为清理，并且 scavengecount 值告诉您自 JVM 启动以来运行了多少。

GlobalGC 收集终身空间。

SystemGC 是通过 java.lang.System.gc() 方法调用调用的全局 GC。请注意，通过 SIGQUIT 创建堆转储时，会在转储之前调用 System.gc() 以确保更小的转储大小。

有关 Nursery 和 Tenured Spaces 的更多信息，请参阅 Java 诊断指南。

于 2014-09-28T19:38:41.633 回答