High CPU utilization due to HostOS domain process FPolicy
Applies to
- ONTAP 9
- HostOS Utilization
Issue
- High CPU on one node.
- FPolicy is not configured.
- Running
sysstat -Mshows high host domain utilization compared to other domains:
AVG CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7 Nwk_Lg Nwk_Exmpt Storage Raid WAFL_Ex(Kahu) Exempt SSAN_Ex Intr Host Ops/s
65% 47% 43% 45% 75% 67% 75% 67% 71% 15% 10% 15% 4% 211%( 14%) 180% 161% 5% 335% 8911
84% 73% 74% 76% 87% 86% 88% 84% 89% 14% 9% 17% 5% 229%( 15%) 124% 167% 10% 366% 9892
89% 80% 84% 83% 93% 90% 91% 91% 91% 17% 11% 12% 6% 190%( 12%) 200% 145% 8% 428% 9796
74% 61% 59% 60% 82% 76% 79% 80% 78% 20% 13% 14% 5% 212%( 14%) 208% 148% 7% 456% 8805
76% 67% 60% 59% 82% 80% 81% 78% 79% 17% 12% 15% 6% 231%( 15%) 174% 157% 6% 388% 9663TOP-BSoutput from full ASUP
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
10 root 8 155 ki31 0K 160K RUN 7 ??? 446.83% idle
2684 root 44 40 0 99244K 13200K uwait 2 3286.6 100.00% fpolicy
0 root 184 -88 - 0K 3944K gemini 5 9741.1 27.88% kernel
3364 root 1 8 - 0K 68K CPU2 2 3039.9 16.36% disk_server_0
4493 root 1 12 - 0K 192K WAIT 4 2814.8 12.99% wafl_exempt05
4488 root 1 12 - 0K 192K WAIT 7 2814.0 12.74% wafl_exempt00
4489 root 1 12 - 0K 192K WAIT 4 2814.9 12.65% wafl_exempt01
4492 root 1 12 - 0K 192K WAIT 7 2812.9 12.55% wafl_exempt04
4491 root 1 12 - 0K 192K WAIT 7 2811.9 12.35% wafl_exempt03
4494 root 1 12 - 0K 192K WAIT 7 2814.4 11.96% wafl_exempt06
4490 root 1 12 - 0K 192K WAIT 4 2811.9 11.57% wafl_exempt02