I have high CPU usage (96%) on my SRX 240H.It lasts max 1 min and it appears one time per week.I checked
traffic on interfaces and flow session during that high CPU period but everything is normal.
Any ideas what could cause the high CPU or some troubleshooting steps ?
High RE CPU or Dataplane CPU?
Please provide below outputs.
root@SRX> show chassis routing-engine
root@SRX>show security monitoring performance spu
If RE CPU is high, make sure you dont have any extended logging like traceoptions,policy logging with event mode.
root@SRX# show | display set | match traceop
Delete if you see any active traceoptions
root@SRX# show security log
if you see mode as event then disable it and then you need to modify configuartion to stream mode (http://kb.juniper.net/KB16224)
Also check if there are multiple users logged in and making chnages, please logout unwated users
root@SRX> show system users
root@SRX> request system logout user <user> Name of user
Wait for some time and see if the utilization comes down.
root@SRX210>show system processes extensive | no-more willhelp you to identify which process is running high.
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Thanks for answer the high cpu lasted maybe 1 min than it was OK.I just wanted to know if it is normal that it raises sometimes so high or is there some problem ?
Momentary CPU spikes in a production device is expected due to many reasons likes traffic spikes, route convergence and all.