clickhouse troubleshooting Archives

ClickHouse Troubleshooting - Profiling Queries for Performance

ClickHouse Query Profiling for Performance Monitoring

Introduction Creating a Python CLI (Command-Line Interface) application for custom profiling of ClickHouse Server queries involves several components. The application will allow users to input queries via the command line, execute them on a ClickHouse […]

ClickHouse Server Configuration for High-Volume Data Ingestion

Shiv Iyer

Optimizing ClickHouse for high-velocity and high-volume data loading involves several server configuration and tuning techniques.

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Tuning index_granularity for ClickHouse Performance

Shiv Iyer

Understanding index granularity is crucial for troubleshooting performance issues in ClickHouse, especially when it comes to optimizing how ClickHouse uses indexes for query execution.

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ClickHouse on Kubernetes: Running ClickHouse Cluster on Minikube

ChistaDATA Inc.

Introduction Kubernetes orchestration simplifies many common operational concerns like scheduling, auto-scaling, and failover. It has support for Persistent Volumes and Persistent Volume Claims ( PV & PVC ). Usually, databases that support replication, sharding, and […]

How to Recover ClickHouse After ZooKeeper Metadata is Corrupted?

ClickHouse Troubleshooting: How to Restore/Recover ClickHouse after ZooKeeper Metadata is Corrupted/Lost

ChistaDATA Inc.

Introduction When you are building a highly available ClickHouse Infrastrstucture for scale and performance we use ZooKeeper for ClickHouse Replication Management and Operations with ReplicatedMergeTree table engine. You can expect ZooKeeper to face data loss […]

ChistaDATA Real-time Analytics

Building Real-time Analytics Infrastructure with ChistaDATA’s ClickHouse

Shiv Iyer

Introduction I have been a full-time Open Source Database Systems Performance Engineer for the last two decades with deep interests in Database Systems Internals, Database Systems (Transaction Processing and ColumnStores) Operations Performance Troubleshooting/Optimization and Unix/Linux […]

ClickHouse Troubleshooting: Not Able to Connect to ClickHouse

Why I am not able to connect to ClickHouse?

ChistaDATA Inc.

Introduction Why I am not able to connect with ClickHouse Server? We often this ticket on our support function and the error will be like “Connection reset by peer while reading from socket”. So we […]