Why Aggregate Latency graph in UM, shows constantly higher latency for one aggregate?
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- Category:
- active-iq-unified-manager
- Specialty:
- om
- Last Updated:
- 3/16/2023, 5:20:07 AM
Applies to
ActiveIQ Unified Manager 9.7P1 (UM) and Later
Answer
- UM calculates the average weighted latency of each disk that is part of the aggregate, based on a few counters, such as Reads, writes and CP reads.
- UM always presents the highest average weighted latency of all the disks, as the aggregate latency
- Even if only one disk has higher latency, the total aggregate latency graph is affected.
Additional Information
- Use the statit command in ONTAP CLI to locate which disk(s) is having higher latency
- How to address latency from disks in ONTAP
- Why does the volume latency not match the aggregate latency in Active IQ Unified Manager?