Question 80
At Westhaven Retail, the commerce database engineering team maintains a high-volume digital checkout and inventory application with requirements for fast transactions and variable seasonal demand. After a claimed fix, the release reviewer evaluates: An application requires predictable resource isolation but several databases in one elastic pool consume each other's shared headroom without monitoring. Which observed result BEST proves the intended problem is corrected?
Explanation
Correct Answer
Concurrent load testing shows each database remains within its allocated limit while the pool stays below its saturation threshold. That observable result supports resolution of: An application requires predictable resource isolation but several databases in one elastic pool consume each other's shared headroom without monitoring. The corresponding corrective change is: Configure suitable elastic pool size and per-database resource limits based on aggregate and peak usage observations. The Westhaven Retail reviewer can distinguish demonstrated database behavior from an untested change claim.
Incorrect Answers
The compression test reduces page reads and allocated space without exceeding the agreed CPU and query latency thresholds. That result is evidence for another corrective change: Evaluate row or page data compression on suitable tables or partitions and measure CPU versus I/O and storage tradeoffs. The alternative problem is: A large rowstore fact table creates I/O pressure because repeated string values are stored uncompressed in cold partitions. The current Westhaven Retail issue is instead: An application requires predictable resource isolation but several databases in one elastic pool consume each other's shared headroom without monitoring. Its decisive acceptance evidence would be: Concurrent load testing shows each database remains within its allocated limit while the pool stays below its saturation threshold.
The database reports adequate free storage after the approved change and no growth operation fails its service limit. That result is evidence for another corrective change: Review independent service-tier compute and storage quotas and scale the supported storage setting or tier as required. The alternative problem is: A managed SQL service's storage approaches its limit and the scaling plan assumes that increasing vCores always increases the allowable data size. The current Westhaven Retail issue is instead: An application requires predictable resource isolation but several databases in one elastic pool consume each other's shared headroom without monitoring. Its decisive acceptance evidence would be: Concurrent load testing shows each database remains within its allocated limit while the pool stays below its saturation threshold.
Representative write transactions achieve the required log and commit latency after the targeted tier or compute adjustment. That result is evidence for another corrective change: Use service-tier and workload metrics to choose a supported Azure SQL performance configuration appropriate for transactional latency. The alternative problem is: An OLTP database is configured with a service tier selected for analytical reporting but short transactions show persistent log-write contention. The current Westhaven Retail issue is instead: An application requires predictable resource isolation but several databases in one elastic pool consume each other's shared headroom without monitoring. Its decisive acceptance evidence would be: Concurrent load testing shows each database remains within its allocated limit while the pool stays below its saturation threshold.