fabric-onelake-perf-remediate

OneLake performance diagnostics analyze capacity utilization, Delta file fragmentation, and cold cache latency using PowerShell, T-SQL, and Spark SQL routines to pinpoint lakehouse query bottlenecks. Ready-to-run scripts guide you through identifying and resolving these specific performance issues.

Remediating Delta table fragmentation and small-file proliferation in Fabric involves applying OPTIMIZE and VACUUM commands. This skill provides deterministic workflows and tuning guidance for these operations to resolve data layout issues and improve lakehouse responsiveness.

Fabric capacity throttling typically stems from workload spikes exceeding SKU limits. This skill diagnoses throttling by analyzing capacity utilization across regions and provides remediation guidance to optimize resources, adjust SKU sizing, and prevent Spark throttling.

Testing OneLake cross-region latency and resolving Direct Lake fallback scenarios utilizes included diagnostic routines. These workflows measure regional access delays and provide targeted remediation steps to restore query performance and fallback behavior.

Yes, PowerShell and the Az.Accounts module are required to run OneLake diagnostics. The skill validates these prerequisites and leverages them alongside T-SQL and Spark SQL to execute deterministic performance checks and remediation workflows.

Enable V-Order in Microsoft Fabric to optimize Delta table file layouts for faster read performance. This skill provides specific tuning guidance for V-Order alongside OPTIMIZE and VACUUM workflows to safely remediate performance bottlenecks.