FAS 8040 frequent high CPU

marcinmf — Wed, 04 Jun 2025 12:10:26 GMT

Hello we are running Ontap 9.2

We are monitoring hardware performance and regularly during the day especially in afternoon hours we see spikes in CPU usage up to 90%

Is there a way to discover what the cause is?

We were running some commands

priv set diag;statit -b

priv set diag;statit –e

sysstat -x

Attached are some results and comparison of 2 different results.

The spikes are for few seconds and goes down to 20%.

Thank you,

Martin

ANY AVG CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7

44% 14% 9% 9% 10% 9% 7% 9% 30% 29%

65% 20% 12% 11% 12% 13% 8% 11% 45% 45%

43% 12% 7% 7% 7% 7% 5% 6% 29% 29%

42% 11% 6% 5% 6% 6% 4% 5% 28% 28%

100% 73% 67% 72% 65% 69% 60% 67% 91% 91%

100% 71% 64% 67% 61% 63% 55% 75% 90% 90%

99% 76% 71% 70% 69% 67% 63% 90% 89% 89%

100% 95% 94% 94% 94% 94% 94% 98% 98% 98%

97% 63% 55% 55% 54% 53% 48% 81% 82% 81%

100% 56% 46% 42% 43% 37% 34% 79% 81% 82%

87% 45% 33% 27% 41% 36% 37% 62% 61% 59%

35% 12% 5% 5% 15% 15% 15% 14% 14% 14%

30% 10% 3% 3% 12% 12% 12% 12% 11% 11%

29% 10% 3% 3% 11% 12% 12% 12% 11% 12%

38% 13% 5% 4% 16% 16% 16% 16% 16% 16%

40% 14% 8% 6% 13% 14% 13% 13% 22% 21%

73% 29% 22% 20% 20% 21% 14% 24% 55% 54%

73% 26% 19% 23% 25% 20% 14% 19% 43% 43%

Re: FAS 8040 frequent high CPU

kahuna — Sat, 26 Oct 2019 14:27:07 GMT

none of the 3 files attached is showing high CPU

marcinmf — Mon, 28 Oct 2019 03:16:55 GMT

Please take a look on attached chart. The CPU spikes keep repeating over the time.

Martin

paul_stejskal — Mon, 28 Oct 2019 17:53:26 GMT

Not enough detail here to really accurately fully diagnose. I would recommend opening a support case so we can pull performance archives.