Reference fixture · clickhouse

# The fastest open-source OLAP database.

Sub-second analytical queries over petabytes. A columnar engine built for real-time analytics, observability, and the agentic workloads of the next decade — running on commodity hardware.

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Cluster Operational

    -- 1.2B rows · 38ms
    SELECT country,
           count(*) AS hits
    FROM   events
    WHERE  ts > '2026-05-01'
    GROUP BY country
    ORDER BY hits DESC
    LIMIT  10;

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100×

Faster than row-oriented stores on analytical workloads.

38ms

P95 latency on 1.2B-row aggregations, single replica.

2.2PB

Largest production cluster — and growing every quarter.

What this fixture exercises

## Engineered for the workloads other databases can't keep up with.

Featured

### Columnar at the core

A vectorized execution engine reads only the columns a query touches. Compression ratios of 10–100× shrink storage and accelerate scans.

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### Real-time ingestion

Millions of rows per second per node. Kafka, S3, JDBC, HTTP — ingest from anywhere, query while writes are still in flight.

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### SQL you already know

ANSI SQL plus a powerful expression library. Window functions, JSON, geospatial, arrays — every analytical primitive, native.

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Form components

## Spin up a cluster in 30 seconds.

Inputs use the same charcoal-bordered geometry as the cards. Focus ring is neon volt — unified interactive feedback across the system.

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Region

Pick a region close to your data sources for lowest latency.