{ "version": "https://jsonfeed.org/version/1", "title": "ObsessionDB Blog", "home_page_url": "https://evren.so/obsessiondb/blog", "feed_url": "https://evren.so/obsessiondb/feed.json", "description": "Data, infra, benchmarks, and tooling for ClickHouse performance and managed database infrastructure.", "icon": "https://evren.so/obsessiondb/favicon-light-v2.svg", "author": { "name": "ObsessionDB", "url": "https://evren.so/obsessiondb" }, "items": [ { "id": "https://evren.so/obsessiondb/blog/clickhouse-query-optimization-what-makes-it-fast", "content_html": "The complete ClickHouse query optimization guide: sorting keys, PREWHERE, data skipping indexes, FINAL evolution, JOIN algorithms, and anti-patterns.", "url": "https://evren.so/obsessiondb/blog/clickhouse-query-optimization-what-makes-it-fast", "title": "ClickHouse® Query Optimization: What Makes It Fast and What Kills It", "image": "https://evren.so/obsessiondb/images/blog/clickhouse-query-optimization-what-makes-it-fast.png", "date_modified": "2026-04-15T00:00:00.000Z", "author": { "name": "Alvaro Garcia" }, "tags": [ "Data" ] }, { "id": "https://evren.so/obsessiondb/blog/clickhouse-projections-complete-guide", "content_html": "ClickHouse projections explained: internal storage, query routing, three projection types, and a decision framework for when to use them vs materialized views.", "url": "https://evren.so/obsessiondb/blog/clickhouse-projections-complete-guide", "title": "ClickHouse® Projections: The Complete Guide", "image": "https://evren.so/obsessiondb/images/blog/clickhouse-projections-complete-guide.png", "date_modified": "2026-04-04T00:00:00.000Z", "author": { "name": "Alvaro Garcia" }, "tags": [ "Data" ] }, { "id": "https://evren.so/obsessiondb/blog/eliminate-pipeline-warehouse-realtime-api", "content_html": "The pipeline between your warehouse and your API is the most expensive infrastructure you own. Not because of what it costs to run, but because of what it costs your team to build, maintain, and debug.", "url": "https://evren.so/obsessiondb/blog/eliminate-pipeline-warehouse-realtime-api", "title": "You Don't Need a Separate Pipeline Between Your Warehouse and Your Real-time APIs", "image": "https://evren.so/obsessiondb/images/blog/eliminate-pipeline-warehouse-realtime-api.png", "date_modified": "2026-04-01T00:00:00.000Z", "author": { "name": "Rafael Aviles" }, "tags": [ "Infra" ] }, { "id": "https://evren.so/obsessiondb/blog/real-time-outlier-detection-clickhouse", "content_html": "Building a pipeline that flags outliers across 15M daily events in 21ms using chained materialized views and rolling quantiles in ClickHouse.", "url": "https://evren.so/obsessiondb/blog/real-time-outlier-detection-clickhouse", "title": "How we detect outliers in real time using ClickHouse®", "image": "https://evren.so/obsessiondb/images/blog/real-time-outlier-detection-clickhouse.png", "date_modified": "2026-03-31T00:00:00.000Z", "author": { "name": "Jose Enrique Barco" }, "tags": [ "Data" ] }, { "id": "https://evren.so/obsessiondb/blog/collapsingmergetree-current-state-event-streams", "content_html": "Instead of asking ClickHouse which row is the latest during merges, you define it during ingestion by cancelling the old value and inserting a new row. 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The architectural problem no tooling could fix, and how we made the complexity disappear.", "url": "https://evren.so/obsessiondb/blog/hard-truth-self-hosting-clickhouse", "title": "The Hard Truth About Self-Hosting ClickHouse® at Scale", "image": "https://evren.so/obsessiondb/images/blog/hard-truth-self-hosting-clickhouse.png", "date_modified": "2026-01-25T00:00:00.000Z", "author": { "name": "Alvaro Garcia" }, "tags": [ "Infra" ] }, { "id": "https://evren.so/obsessiondb/blog/announcement", "content_html": "At Numia, we operate blockchain data infrastructure at near-petabyte scale. By late 2024, our infrastructure costs had become unsustainable. We built ObsessionDB to solve this problem.", "url": "https://evren.so/obsessiondb/blog/announcement", "title": "Cutting Our ClickHouse Bill in Half: The Story Behind ObsessionDB", "image": "https://evren.so/obsessiondb/images/blog/announcement.png", "date_modified": "2026-01-20T00:00:00.000Z", "author": { "name": "Marc Höffl" }, "tags": [ "Infra" ] } ] }