Articles by ChistaDATA Inc.

About ChistaDATA Inc.

We are an full-stack ClickHouse infrastructure operations Consulting, Support and Managed Services provider with core expertise in performance, scalability and data SRE. Based out of California, Our consulting and support engineering team operates out of San Francisco, Vancouver, London, Germany, Russia, Ukraine, Australia, Singapore and India to deliver 24*7 enterprise-class consultative support and managed services. We operate very closely with some of the largest and planet-scale internet properties like PayPal, Garmin, Honda cars IoT project, Viacom, National Geographic, Nike, Morgan Stanley, American Express Travel, VISA, Netflix, PRADA, Blue Dart, Carlsberg, Sony, Unilever etc

ClickHouse Performance: Estimated & Actual Row Counts in Execution Plans

PREWHERE vs WHERE in ClickHouse Queries

ChistaDATA Inc.

PREWHERE vs WHERE: When and How to Optimize Your ClickHouse Queries Introduction Query performance in ClickHouse often hinges on how efficiently you filter data. While most SQL users are familiar with the WHERE clause, ClickHouse […]

Understanding ClickHouse Wait Events

ChistaDATA Inc.

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 […]

Reduce Query Memory Usage in ClickHouse

ChistaDATA Inc.

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 […]

Troubleshooting Underutilized ClickHouse Index

Unlock Blistering Query Speed with ClickHouse LowCardinality

ChistaDATA Inc.

Unlock Blistering Query Speed with ClickHouse LowCardinality: A ChistaDATA Guide ClickHouse is famous for raw speed, but some of its most powerful tools remain under-documented. Among them, the LowCardinality data type is arguably the simplest […]

Partitioning in ClickHouse

ChistaDATA Inc.

Mastering ClickHouse Partitioning for Optimal Query Speed Summary ClickHouse Partitioning is one of the fastest ways to boost query speed and simplify data retention in ClickHouse. By grouping rows into logical segments—usually by month, day, […]

Connect Prometheus to Your ClickHouse® Cluster

ChistaDATA Inc.

Connect Prometheus to Your ClickHouse® Cluster: Complete Monitoring and Observability Guide Introduction In today’s data-driven landscape, monitoring your database infrastructure is crucial for maintaining optimal performance, ensuring reliability, and preventing costly downtime. ClickHouse®, renowned for […]

Updating and Deleting ClickHouse Data with Mutations

ChistaDATA Inc.

Updating and Deleting ClickHouse Data with Mutations: A Complete Guide ClickHouse has revolutionized analytical data processing with its columnar storage and lightning-fast query performance. However, one challenge that developers often face is modifying existing data […]

Master ClickHouse Custom Partitioning Keys

ChistaDATA Inc.

Master ClickHouse Custom Partitioning Keys: Optimize Performance and Reduce Costs Unlock the full potential of your ClickHouse database with strategic custom partitioning – A comprehensive guide from ChistaDATA’s experts When it comes to maximizing ClickHouse […]

Building a Custom ETL Tool: Technical Implementation for PostgreSQL to ClickHouse Data Movement

ChistaDATA Inc.

Building a Custom ETL Tool: Technical Implementation for PostgreSQL to ClickHouse Data Movement Modern data architectures frequently require moving data between OLTP systems like PostgreSQL and OLAP systems like ClickHouse to support both transactional workloads […]

Maximizing Real-Time Analytics Performance: How ClickHouse Revolutionizes Data Processing

ChistaDATA Inc.

Maximizing Real-Time Analytics Performance: How ClickHouse Revolutionizes Data Processing In today’s data-driven landscape, organizations require lightning-fast analytics capabilities to stay competitive. Real-time data analysis has become essential for applications ranging from fraud detection to observability […]