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 clickhouse-core-workflow-a)
• Access to system.query_log and system.parts

Instructions

Step 1: Diagnose Slow Queries

-- Find the slowest queries in the last 24 hours
SELECT