High disk utilization at night between 1 to 5 AM
- Views:
- 1,205
- Visibility:
- Public
- Votes:
- 0
- Category:
- metrocluster
- Specialty:
- perf
- Last Updated:
- 10/5/2023, 11:22:27 AM
Applies to
- ONTAP 9
- All FAS, AFF, Cloud Volumes ONTAP, or ONTAP Select clusters or Metroclusters
Issue
- Disk utilization is seen or reported to be high daily at 1 AM (cluster time) to 5 AM or on Sundays 1AM to 7 AM (AFF) or 1 AM to 1 PM (FAS)
- A high disk utilization alert is seen for high disk load overnight, and is not when deduplication or other processes are running
- Active IQ Unified Manager events:
- Aggregate Disks Over-utilized Event Obsoleted
- Aggregate Latency Critical Threshold Breached
- MAX Data Disk Utilization value of % on <aggregate> has triggered a WARNING event based on threshold setting of 95%
- Suggested Actions to Fix The Issue
- Consider moving the workloads to another aggregate