Exam NCA-7.5 Topic 1 Question 8 Discussion

Once CPU consumption, CPU contention and memory utilization have been reviewed and found stable, storage latency becomes the next relevant performance domain. A VM can have adequate compute resources yet remain slow because guest read or write operations are waiting for the storage path. High latency may arise from workload contention, abnormal I/O patterns, a storage-controller issue, or an underlying infrastructure condition.
Prism exposes VM and infrastructure metrics including IOPS, bandwidth, read latency, write latency and total I/O latency. The administrator should correlate the VM's latency with its IOPS and throughput, then compare those values with storage-container, host and cluster-level metrics over the same interval. This determines whether the delay is isolated to the VM or reflects a broader storage condition.
License expiration may affect access to licensed features, but it is not the primary diagnostic explanation for an actively running VM's I/O responsiveness. RBAC controls administrative permissions rather than guest workload performance. Container sizing is not a standard immediate troubleshooting metric; the measurable symptom to examine first is latency.
NHCF/NCA reference: Cluster Performance-analysis charts, reports and workload-performance interpretation; NCA Section 4, "Review and interpret workload performance." Official references: Prism 7.5- Performance Monitoring , Prism Central 7.5-VM Summary Metrics .