High CPU Utilization observed in VSAN witness 7.0
Article ID: 326788
Updated On:
Products
VMware vSphere ESXi
Issue/Introduction
Symptoms:
In the witness VM of vSAN 7.0, you experience this symptom:
High CPU utilization is observed.
In the witness VM of vSAN 7.0, you experience this symptom:
High CPU utilization is observed.
Environment
VMware vSphere ESXi 7.0.0
Cause
The Dying Disk Handling (DDH) feature in vSAN continuously monitors the health of disks/diskgroups in order to detect an impending disk/diskgroup failure or a poorly performing diskgroup. For more information, see Dying Disk Handling (DDH) in vSAN 6.6 (2148358).
The daemon vsandevicemonitord runs periodically and checks the state of the disk/diskgroup. In witness VM, this daemon runs continuously without sleep causing the high CPU usage.
The daemon vsandevicemonitord runs periodically and checks the state of the disk/diskgroup. In witness VM, this daemon runs continuously without sleep causing the high CPU usage.
Resolution
Upgraded vCenter/ESXi to 7.0U1 or higher
Workaround:
To work around this issue, stop the daemon in the witness VM by running this command:
/etc/init.d/vsandevicemonitord stop
Workaround:
To work around this issue, stop the daemon in the witness VM by running this command:
/etc/init.d/vsandevicemonitord stop
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