wangdafang commented on issue #4630: [Significant BUG]Spring Annotation Plugins Makes FULLGC Without Stop URL: https://github.com/apache/skywalking/issues/4630#issuecomment-611879275 > For agent, the description is not clear. Please do some research about which objects cause the memory usage increase. One guess, as you are using annotation plugin, more classes will be generated, Please make sure you have even perm size. > > For backend, Id is generated in the register process, if that never successes, It must be something else wrong. [Supplement] Agent version is 6.6.2 When the jvm-OLD is 100%,execute 'jmap -histo pid',and receive num #instances #bytes class name ---------------------------------------------- 1: 48297953 5118173992 [C 2: 38587050 2160874800 org.apache.skywalking.apm.network.register.v2.Endpoint 3: 44771449 1074514776 java.lang.String 4: 3246315 761023720 [B 5: 972883 334963928 [Ljava.lang.Object; 6: 622864 236176640 [I 7: 5788779 231551160 sun.nio.cs.UTF_8$Decoder 8: 942953 114192712 [Ljava.util.HashMap$Node; 9: 1904315 91407120 org.apache.skywalking.apm.network.register.v2.EndpointMappingElement 10: 2546854 81499328 java.util.HashMap$Node execute 'jstat -gcutil pid' S0 S1 E O M CCS YGC YGCT FGC FGCT GCT 0.00 100.00 100.00 100.00 97.17 93.43 14 5.029 37 128.189 133.219 0.00 26.51 100.00 100.00 97.17 93.43 14 5.029 37 143.384 148.413 0.00 34.17 100.00 100.00 97.17 93.43 14 5.029 37 143.384 148.413 0.00 35.71 100.00 100.00 97.17 93.43 14 5.029 38 143.384 148.413 execute jps -lmvV pid org.apache.skywalking.oap.server.starter.OAPServerStartUp -Xms12g -Xmn6g -Xmx12g -XX:SurvivorRatio=8 -XX:MetaspaceSize=1024M -XX:MaxMetaspaceSize=1024M -XX:+UseConcMarkSweepGC -XX:CMSMaxAbortablePrecleanTime=5000 -XX:+CMSClassUnloadingEnabled -XX:CMSInitiatingOccupancyFraction=80 -XX:+UseCMSInitiatingOccupancyOnly -XX:+ExplicitGCInvokesConcurrent -Xloggc:/logs/oap/gc.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Doap.logDir=/sw/apache-skywalking-apm-bin/logs
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