ClickHouse Performance Tuning Overview Diagnose and fix ClickHouse performance issues using query analysis, proper indexing, projections, materialized views, and server settings tuning. Prerequisites - ClickHouse tables with data (see ) - Access to and Instructions Step 1: Diagnose Slow Queries Step 2: ORDER BY Key Optimization The ORDER BY key is ClickHouse's primary performance lever. Queries that filter on the ORDER BY prefix skip entire granules (8192-row chunks). Step 3: Data Skipping Indexes Step 4: Projections (Automatic Pre-Aggregation) Step 5: Key Server Settings Step 6: Materialized…