cpu过高分析
cpu java linux
--20190325
命令
[root@localhost ~]# top --查看cpu
[root@localhost ~]# top -p 6734 -H --观察该进程中所有线程的CPU占用
[root@localhost ~]# printf "%x\n" 6759 --找出CPU消耗较多的线程id，转16进制
1a67
[root@localhost ~]# jstack 6734|grep 1a67 -A 30 --打印堆栈信息，提交开发分析处理
[root@localhost ~]# top --查看cpu
6734 root 20 0 4557896 1.823g 10900 S 373.4 11.7 728:54.78 java
3207 root 20 0 3005436 858680 8156 S 24.9 5.3 350:39.55 mysqld
1 root 20 0 57640 7524 2644 S 0.0 0.0 0:02.75 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.08 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:02.27 ksoftirqd/0
5 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
7 root rt 0 0 0 0 S 0.0 0.0 0:00.02 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/0
10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/1
11 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/2
12 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcuob/3
13 root 20 0 0 0 0 S 0.0 0.0 0:12.53 rcu_sched
14 root 20 0 0 0 0 S 0.0 0.0 0:03.63 rcuos/0
15 root 20 0 0 0 0 S 0.0 0.0 0:04.65 rcuos/1
16 root 20 0 0 0 0 S 0.0 0.0 0:04.78 rcuos/2
17 root 20 0 0 0 0 R 0.0 0.0 0:04.42 rcuos/3
18 root rt 0 0 0 0 S 0.0 0.0 0:00.57 watchdog/0
[root@localhost ~]# top -p 6734 -H --观察该进程中所有线程的CPU占用
6759 root 20 0 4557896 1.812g 10876 R 41.5 11.7 67:40.75 java
6764 root 20 0 4557896 1.812g 10876 R 39.2 11.7 67:57.70 java
6761 root 20 0 4557896 1.812g 10876 R 38.9 11.7 69:24.02 java
6760 root 20 0 4557896 1.812g 10876 R 37.9 11.7 67:31.72 java
6756 root 20 0 4557896 1.812g 10876 R 36.5 11.7 67:53.37 java
6758 root 20 0 4557896 1.812g 10876 R 36.5 11.7 68:01.22 java
6763 root 20 0 4557896 1.812g 10876 R 36.5 11.7 68:14.78 java
6762 root 20 0 4557896 1.812g 10876 R 35.2 11.7 67:48.78 java
6757 root 20 0 4557896 1.812g 10876 R 33.2 11.7 67:32.28 java
6755 root 20 0 4557896 1.812g 10876 R 30.9 11.7 70:03.97 java
[root@localhost ~]# printf "%x\n" 6759 --找出CPU消耗较多的线程id，转16进制
1a67
[root@localhost ~]# jstack 6734|grep 1a67 -A 30 --打印堆栈信息，提交开发分析处理
"startJob_Worker-5" prio=10 tid=0x00007f15c4c07800 nid=0x1a67 runnable [0x00007f159cc74000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
at org.hibernate.intercept.FieldInterceptionHelper.extractFieldInterceptor(FieldInterceptionHelper.java:45)
at org.hibernate.intercept.FieldInterceptionHelper.clearDirty(FieldInterceptionHelper.java:81)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:209)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:127)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.stech.jgy.impl.local.rich.local.JgyManager.getStudentAppointByTeacherAppointId(JgyManager.java:1929)
at com.stech.webplus.jgy.action.Util.AppointThread.correctStudentAppointError(AppointThread.java:410)
at com.stech.webplus.jgy.action.Util.AppointThread.checkThreadByHours(AppointThread.java:148)
at sun.reflect.GeneratedMethodAccessor672.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
"startJob_Worker-4" prio=10 tid=0x00007f15c47bf000 nid=0x1a66 runnable [0x00007f159cd75000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
at org.hibernate.intercept.FieldInterceptionHelper.extractFieldInterceptor(FieldInterceptionHelper.java:45)
at org.hibernate.intercept.FieldInterceptionHelper.clearDirty(FieldInterceptionHelper.java:81)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:209)
[root@localhost ~]#
实例
================================================================================
[root@localhost ~]# jstack 6734|grep la4e -A 30
[root@localhost ~]# printf "%x\n" 6764
1a6c
[root@localhost ~]# jstack 6734|grep 1a6c -A 30
"startJob_Worker-10" prio=10 tid=0x00007f15c45c7000 nid=0x1a6c runnable [0x00007f159c76e000]
java.lang.Thread.State: RUNNABLE
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getPropertyValues(AbstractEntityTuplizer.java:256)
at org.hibernate.tuple.entity.PojoEntityTuplizer.getPropertyValues(PojoEntityTuplizer.java:209)
at org.hibernate.persister.entity.AbstractEntityPersister.getPropertyValues(AbstractEntityPersister.java:3581)
at org.hibernate.event.def.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:167)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:120)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.stech.jgy.impl.local.rich.local.JgyManager.getStudentAppointByTeacherAppointId(JgyManager.java:1929)
at com.stech.webplus.jgy.action.Util.AppointThread.correctStudentAppointError(AppointThread.java:410)
at com.stech.webplus.jgy.action.Util.AppointThread.checkThreadByHours(AppointThread.java:148)
at sun.reflect.GeneratedMethodAccessor672.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
"startJob_Worker-9" prio=10 tid=0x00007f15c4b84000 nid=0x1a6b runnable [0x00007f159c870000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
at org.hibernate.intercept.FieldInterceptionHelper.extractFieldInterceptor(FieldInterceptionHelper.java:45)
at org.hibernate.intercept.FieldInterceptionHelper.clearDirty(FieldInterceptionHelper.java:81)
[root@localhost ~]#
[root@localhost ~]# printf "%x\n" 6761
1a69
[root@localhost ~]# jstack 6734|grep 1a69 -A 30
"startJob_Worker-7" prio=10 tid=0x00007f15c4aa5800 nid=0x1a69 runnable [0x00007f159ca71000]
java.lang.Thread.State: RUNNABLE
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
at org.hibernate.tuple.entity.AbstractEntityTuplizer.getPropertyValues(AbstractEntityTuplizer.java:256)
at org.hibernate.tuple.entity.PojoEntityTuplizer.getPropertyValues(PojoEntityTuplizer.java:209)
at org.hibernate.persister.entity.AbstractEntityPersister.getPropertyValues(AbstractEntityPersister.java:3581)
at org.hibernate.event.def.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:167)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:120)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.stech.jgy.impl.local.rich.local.JgyManager.getStudentAppointByTeacherAppointId(JgyManager.java:1929)
at com.stech.webplus.jgy.action.Util.AppointThread.correctStudentAppointError(AppointThread.java:410)
at com.stech.webplus.jgy.action.Util.AppointThread.checkThreadByHours(AppointThread.java:148)
at sun.reflect.GeneratedMethodAccessor672.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
"startJob_Worker-6" prio=10 tid=0x00007f15c4249000 nid=0x1a68 runnable [0x00007f159cb73000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
[root@localhost ~]#
[root@localhost ~]# printf "%x\n" 6760
1a68
[root@localhost ~]# jstack 6734|grep 1a68 -A 30
"startJob_Worker-6" prio=10 tid=0x00007f15c4249000 nid=0x1a68 runnable [0x00007f159cb73000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
at org.hibernate.intercept.FieldInterceptionHelper.extractFieldInterceptor(FieldInterceptionHelper.java:45)
at org.hibernate.intercept.FieldInterceptionHelper.clearDirty(FieldInterceptionHelper.java:81)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:209)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:127)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.stech.jgy.impl.local.rich.local.JgyManager.getStudentAppointByTeacherAppointId(JgyManager.java:1929)
at com.stech.webplus.jgy.action.Util.AppointThread.correctStudentAppointError(AppointThread.java:410)
at com.stech.webplus.jgy.action.Util.AppointThread.checkThreadByHours(AppointThread.java:148)
at sun.reflect.GeneratedMethodAccessor672.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
"startJob_Worker-5" prio=10 tid=0x00007f15c4c07800 nid=0x1a67 runnable [0x00007f159cc74000]
java.lang.Thread.State: RUNNABLE
at java.lang.Class.getInterfaces(Native Method)
at org.hibernate.intercept.FieldInterceptionHelper.extractFieldInterceptor(FieldInterceptionHelper.java:45)
at org.hibernate.intercept.FieldInterceptionHelper.clearDirty(FieldInterceptionHelper.java:81)
at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:209)
[root@localhost ~]#
[root@localhost ~]# printf "%x\n" 6756
1a64
[root@localhost ~]# jstack 6734|grep 1a64 -A 30
"startJob_Worker-2" prio=10 tid=0x00007f15c45f7800 nid=0x1a64 runnable [0x00007f159cf76000]
java.lang.Thread.State: RUNNABLE
at java.util.HashMap.get(HashMap.java:303)
at org.hibernate.util.FastHashMap.get(FastHashMap.java:254)
at org.hibernate.tuple.EntityModeToTuplizerMapping.getTuplizerOrNull(EntityModeToTuplizerMapping.java:59)
at org.hibernate.tuple.EntityModeToTuplizerMapping.getTuplizer(EntityModeToTuplizerMapping.java:72)
at org.hibernate.tuple.entity.EntityMetamodel.getTuplizer(EntityMetamodel.java:106)
at org.hibernate.persister.entity.AbstractEntityPersister.getTuplizer(AbstractEntityPersister.java:3198)
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:3596)
at org.hibernate.event.def.DefaultFlushEntityEventListener.checkId(DefaultFlushEntityEventListener.java:53)
at org.hibernate.event.def.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:164)
at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:120)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:196)
at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:35)
at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:969)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1114)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.stech.jgy.impl.local.rich.local.JgyManager.getStudentAppointByTeacherAppointId(JgyManager.java:1929)
at com.stech.webplus.jgy.action.Util.AppointThread.correctStudentAppointError(AppointThread.java:410)
at com.stech.webplus.jgy.action.Util.AppointThread.checkThreadByHours(AppointThread.java:148)
at sun.reflect.GeneratedMethodAccessor672.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:276)
at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:260)
at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:86)
at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
"startJob_Worker-1" prio=10 tid=0x00007f15c4aff800 nid=0x1a63 runnable [0x00007f159d077000]