ClickHouse DBaaS

Troubleshooting ClickHouse in Kubernetes

Introduction: Troubleshooting ClickHouse in Kubernetes This knowledge base provides a foundational guide for administrators and developers to troubleshoot ClickHouse instances running on Kubernetes pods within an AWS EKS environment. By following these steps, users can […]
ClickHouse

ClickHouse Complete Guide to LowCardinality

ClickHouse Complete Guide to LowCardinality: When and How to Use It Introduction ClickHouse, the high-performance columnar database management system, offers a specialized data type called LowCardinality that serves as a powerful optimization tool for specific […]
Overview of Vectorized Query Processing in ClickHouse
ChistaDATA

Troubleshooting Disk Space in ClickHouse

Troubleshooting Disk Space Issues: Managing ClickHouse Log Tables ClickHouse is a high-performance, columnar database management system optimized for real-time analytical workloads. While its speed and scalability make it ideal for large-scale data processing, one common […]
ClickHouse Search: Case-sensitive Searches with UPPER & LOWER Functions
ChistaDATA

Boosting Materialized View Performance

Aggregation States: Boosting Materialized View Performance by 10x in ClickHouse ClickHouse has long been celebrated for its lightning-fast analytical query performance, especially when handling massive datasets in real time. One of the most powerful features […]
Tuning index_granularity for ClickHouse Performance
ChistaDATA

Understanding ClickHouse Wait Events

Understanding ClickHouse Wait Events: A Comprehensive Troubleshooting Guide Introduction Wait events in ClickHouse reveal where query execution slows down—whether from disk bottlenecks, lock contention, CPU saturation, or network latency. Mastering these signals empowers you to […]
Using EXPLAIN to Determine JOIN Order in ClickHouse Query Execution Plan
ChistaDATA

Reduce Query Memory Usage in ClickHouse

How to Reduce Query Memory Usage in ClickHouse: Troubleshooting Memory Limit Exceeded Errors Memory limit exceeded errors are among the most common challenges ClickHouse users face when running complex analytical queries. Whether you’re performing large […]