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idle CPU value is too low (CPU Spikes)

‎01-27-2014 11:05 PM

Hi,

 

In one of our MX960, CPU was spike in very short interval around 1-2 seconds each time.

The idle CPU value is getting low. When checked the process utilisation, could not see any process which is consuming more CPU. Could anyone please help me.

 

PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
1157 root 1 113 0 8836K 7224K RUN 404.4H 27.25% eventd
2830 root 1 4 0 76696K 21512K pfesta 53.9H 19.09% mib2d
2831 root 1 108 0 29936K 26628K select 896:07 15.87% snmpd
11 root 1 171 52 0K 12K RUN 1341.3 14.11% idle
1543 root 2 8 -88 44244K 18172K nanslp 159.9H 7.67% chassisd
20 root 1 -68 -187 0K 12K WAIT 19.8H 2.25% irq10: em0 em1+++*
14 root 1 -40 -159 0K 12K WAIT 17.4H 1.07% swi2: net
2828 root 2 96 0 62936K 15100K select 713:33 0.93% pfed
1553 root 1 96 0 9868K 7872K select 31.8H 0.88% ppmd
2784 root 1 4 0 99496K 53100K kqread 613:50 0.00% rpd
12 root 1 -20 -139 0K 12K WAIT 222:49 0.00% swi7: clock sio
15 root 1 -16 0 0K 12K - 158:07 0.00% yarrow
9 root 1 171 52 0K 12K pgzero 73:05 0.00% pagezero
2835 root 1 96 0 27600K 10248K select 62:20 0.00% bdbrepd
1568 root 1 96 0 6192K 2964K select 38:06 0.00% license-check
2785 root 1 96 0 15032K 10368K select 35:28 0.00% l2ald
2820 root 3 20 0 7820K 2972K sigwai 34:33 0.00% jddosd
1565 root 1 96 0 13448K 5908K select 27:09 0.00% shm-rtsdbd

 

Regards,

Shree.

2 REPLIES 2
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Re: idle CPU value is too low (CPU Spikes)

‎01-29-2014 02:46 AM

Hi,

 

We also faced this issue but with SRX-650 device, The issue was with SNMP. SNMP was intermittently sending the whole route table stuff to polling server, and the CPU spikes shoots up to 90% at that time.
Check your SNMP configuration, may it helps you..

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Re: idle CPU value is too low (CPU Spikes)

‎01-29-2014 09:46 PM

Hi ,

 

Thanks you for the clue. Will check for the SNMP configuration.

But from the show system process output, could see that when idle is 8.89%, snmpd process also 0% and could not see any process with high utilisation.

 

11 root 1 171 52 0K 12K RUN 1290.4 8.89% idle
-

-
2831 root 1 96 0 29936K 26624K select 858:23 0.00% snmpd

 

Regards,

Shree.

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