案例分析一次c4506交换机cpu利用率过高的处理过程

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1、案例分析：一次C4506交换机CPU利用率过高的处理过程刚处理过一次C4506交换机CPU利用率过高（1）通过交换机showproccpu的命令输出的信息可以看到：在5秒、1分钟、5分钟内Cat4kMgmtLoPri进程的CPU占用率分别为91.69%92.18%92.23%显然是这个进程消耗了大量的CPU运行资源，从而导致交换机没有新的资源处理新的请求。处理器运行两个进程，Cat4kMgmtHiPri和Cat4kMgmtLoPri，这两个进程同其他进程一样要占用cpu时间。当Cat4k平台上某项进程占用cpu超出了应分

2、配的cpu时间，Cat4kMgmtLoPri会接管这项进程，使其他进程能够得到cpu时间。同样当某个进程占用cpu时间没有超过规定的cpu利用率，Cat4kMgmtHiPri会接管这个进程。而Cat4kMgmtLoPri进程CPU占用率超过90%，我们判断一定是某一个进程大大超过了CPU应分配的时间，而Cat4kMgmtLoPri进程试图接管这一进程，而导致了Cat4kMgmtLoPri进程的CPU占用时间超过了90%。根据这一思路只要我们找出这个进程，将其关闭或找出这个进程的作用，就可以解决这个问题并能够找出CPU占用

3、率过高的原因。showproccpuCPUutilizationforfiveseconds:99%/0%;oneminute:99%;fiveminutes:99%PIDRuntime(ms)InvokeduSecs5Sec1Min5MinTTYProcess101300.00%0.00%0.00%0ChunkManager255221883250.00%0.00%0.00%0LoadMeter316013112210.00%0.00%0.00%0SpanTreeHelper40100.00%0.00%0.00%0De

4、ferredEvents51039241473270540.00%0.06%0.05%0Checkheaps64220000.00%0.00%0.00%0PoolManager70200.00%0.00%0.00%0Timers80200.00%0.00%0.00%0SerialBackgroun90100.00%0.00%0.00%0AAA_SERVER_DEADT100200.00%0.00%0.00%0AAAhigh-capacit110100.00%0.00%0.00%0PolicyManager12161825

5、80.00%0.00%0.00%0IPCDynamicCach130100.00%0.00%0.00%0IPCZoneManager1464410913550.00%0.00%0.00%0IPCPeriodicTim1541210913630.00%0.00%0.00%0IPCDeferredPor160100.00%0.00%0.00%0IPCSeatManager170100.00%0.00%0.00%0IFSAgentManage181624845140053160.23%0.21%0.22%0ARPInput19

6、681161810.00%0.00%0.00%0EntityMIBAPI200100.00%0.00%0.00%0SERIALA'detect2185610913670.00%0.00%0.00%0DynamicARPInsp22206027333750.00%0.00%0.00%0HCCounterTimer230100.00%0.00%0.00%0CriticalBkgnd24171691507180.00%0.00%0.00%0NetBackground250500.00%0.00%0.00%0Logger2671

7、610911760.00%0.00%0.00%0TTYBackground272072111013180.00%0.00%0.00%0Per-SecondJobs28382921947196670.00%0.04%0.00%0Per-minuteJobs29285850888073603244.63%3.81%3.72%0Cat4kMgmtHiPri308437156467467994125091.69%92.18%92.23%0Cat4kMgmtLoPri312604935850.00%0.00%0.00%0Galio

8、sReschedul320200.00%0.00%0.00%0IOSACLHelper330200.00%0.00%0.00%0NAMManager341522760000.00%0.00%0.00%0rftask3512428405853300.00%0.00%0.00%0NetInput3611620230225