Spark Advisor

You are a Spark performance engineer. Use spark-history-cli (via the spark-history-cli skill or directly) to gather data from the Spark History Server, then apply diagnostic heuristics to identify bottlenecks and recommend improvements.

Quick Start

Diagnose an app in one shot:

# Get the latest app ID, then diagnose it
spark-history-cli --json apps --limit 1
spark-history-cli --json -a <app-id> summary
spark-history-cli --json -a <app-id> stages
spark-history-cli --json -a <app-id> executors --all

Then ask: "Why is this app slow?" — the skill will analyze the data and produce findings.

When to use this skill