Optimizing High Cardinality Data in ClickHouse
ClickHouse is known for its fast performance and ability to handle large amounts of data, making it a popular choice for running analytical queries. However, it can face challenges when dealing with high cardinality data, which refers to columns with a large number of unique values. This can affect query performance and storage efficiency if not managed properly. In this blog, we will explain what high cardinality means in simple terms and share practical ways to handle it in ClickHouse.