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案例库

ar2240 cpu占用率过高

发布时间:  2019-07-23  |   浏览次数:  1145  |   下载次数:  3  |   作者:  yWX598698  |   文档编号: EKB1001919859

目录

问题描述

AR2240 CPU使用率过高,导致设备无法正常运行,底下终端无法上网,集中在上午上班时间9-10点。重启设备便恢复正常。

告警信息

CPU过高。


2018-9-3 09:09:01+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[390]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(82.1%), SOCK(2.0%), SUPER-PTS(2.0%) . (CpuUsage=95%, Threshold=80%)

2018-9-3 09:12:56+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[391]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(86.9%), SUPER-PTS(1.4%), MON(1.3%) . (CpuUsage=97%, Threshold=80%)

2018-9-3 09:19:25+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[423]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(83.9%), SUPER-PTS(1.4%), MON(1.2%) . (CpuUsage=97%, Threshold=80%)


2018-9-3 09:23:16+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[12]:The CPU is overloaded, and the tasks with top three CPU occupancy are CFM(56.0%), sdcard_demond1(18.8%), TICK(5.1%) . (CpuUsage=98%, Threshold=80%)

2018-9-3 09:23:34+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[13]:The CPU is overloaded, and the tasks with top three CPU occupancy are sdcard_demond1(46.0%), WebT(16.3%), VALP(5.8%) . (CpuUsage=100%, Threshold=80%)

2018-9-3 09:28:23+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[29]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(70.0%), IKE(4.5%), SOCK(2.7%) . (CpuUsage=94%, Threshold=80%)

2018-9-3 09:34:20+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[43]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(86.3%), SUPER-PTS(1.6%), MON(1.2%) . (CpuUsage=96%, Threshold=80%)

2018-9-3 09:36:54+00:00 AR2240 %%01CPUP/4/CPU_USAGE_HIGH(l)[64]:The CPU is overloaded, and the tasks with top three CPU occupancy are VALP(77.8%), We0(3.7%), SessionWorkerTask(2.1%) . (CpuUsage=98%, Threshold=80%)


处理过程

首先因为CPU占用率过高都是集中在上午上班高峰期,所以先怀疑可能是因为业务繁重造成ar设备CPU过高,导致设备性能不足,然后无法正常工作。

查看客户的告警信息后发现,有一个进程valp,这个进程占用了大量CPU资源80%,然后查询对应进程的具体功能,发现这个进程对应的功能是nat alg功能。

然后然后客户诊断信息,发现确实开启了nat alg。

#
 nat alg dns enable
 nat alg ftp enable
 nat alg rtsp enable
 nat alg sip enable
 nat alg pptp enable
#

最后,建议客户在不影响业务的情况下将nat alg功能关闭,然后客户实施后,观察一周,问题未再次出现。

根因

开启了nat alg功能,占用了设备大量cpu利用率。

解决方案

登录设备,关闭nat alg功能。

<Huawei> system-view
[Huawei] undo nat alg ftp enable
[Huawei] undo nat alg dns enable

建议与总结

因为不同设备性能不通,建议根据设备性能进行功能配置。