“ClickHouse plays a really important role in our automated monitoring efforts. We’re handling a massive amount of data—about seven million rows per second—but with just 24 servers, we’ve achieved outstanding cost performance.” - Haruki Okada, Senior Softw

ClickHouse is a leading platform for open-source columnar database technology and real-time analytics. With ClickHouse, developers can delve into documentation, case studies, and performance benchmarks to learn how to build highly scalable and performant analytical systems. It provides tips about ClickHouse's storage engine, query execution, and distributed architecture. Developers can gain insights into their data in real-time, enabling them to make informed decisions and extract  business insights.

ClickHouse

LY Corporation (LINE + Yahoo! Japan) uses ClickHouse to monitor one of the world's largest Kafka deployments, processing over 1 trillion messages and 2.6 PB daily. With just 24 servers, ClickHouse ingests 7 million rows per second of Kafka API request logs, storing over 4.1 trillion rows. This observability stack enabled engineers to identify and patch a rare upstream Kafka race condition between Produce and ListOffsets APIs by querying billions of logs to pinpoint the exact collision timing. The system demonstrates how ClickHouse's SQL compatibility, compression efficiency, and horizontal scalability enable millisecond-level debugging at extreme scale.

How LY Corporation uses ClickHouse to observe one of the largest Kafka deployments on earth