High CPU utilization due to branch-cache feature
Applies to
- ONTAP 9
- CIFS/SMB
- BranchCache
Issue
- CPU utilization is high
- HOST OS is the busiest CPU domain domain
Example:
cluster::> set diag
cluster::*> node run cluster-2a sysstat -c 20 -M 1
- Hashd is consuming the CPU host domain
Example:
cluster::> set advanced
cluster::*> node run -node cluster-2a ps -z
Wait for 1 minute
cluster::*> node run -node cluster-2a ps
Process statistics over 58.471 seconds...
ID State Domain LastRan_ms %CPU StackUsed %StackUsed Name
3639 FB o 298425 99% 0 100% hashd
3640 FB o 90459243 98% 0 100% hashd
3641 FB o 90459243 99% 0 100% hashd
3642 FB o 90459243 99% 0 100% hashd
3643 FB o 90459243 0% 0 100% hashd
3644 FB o 2098312 0% 0 100% hashd
3645 FB o 90459242 0% 0 100% hashd
3646 FB o 3928472 0% 0 100% hashd