--- title: Andrew Dunstan's PostgreSQL and Technical blog:... description: Release 21 of the PostgreSQL Buildfarm Client introduces several new features and fixes. Key additions include a PatchStack module for testing patch stacks on... canonical: https://daily.dev/posts/andrew-dunstan-s-postgresql-and-technical-blog-belatedly-announcing-release-21-of-the-postgresql--tyoyyurkg twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Andrew Dunstan's PostgreSQL and Technical blog: (Belatedly) Announcing Release 21 of the PostgreSQL Buildfarm Client | daily.dev og:description: Release 21 of the PostgreSQL Buildfarm Client introduces several new features and fixes. Key additions include a PatchStack module for testing patch stacks on... og:url: https://daily.dev/posts/andrew-dunstan-s-postgresql-and-technical-blog-belatedly-announcing-release-21-of-the-postgresql--tyoyyurkg og:image: https://api.daily.dev/og/posts/TyoYyURKg.png og:image:alt: Andrew Dunstan's PostgreSQL and Technical blog: (Belatedly) Announcing Release 21 of the PostgreSQL Buildfarm Client og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Andrew Dunstan's PostgreSQL and Technical blog: (Belatedly) Announcing Release 21 of the PostgreSQL Buildfarm Client **[Planet PostgreSQL](https://daily.dev/sources/planet-postgresql)** · 3 min read · 0 upvotes · 0 comments ## Summary Release 21 of the PostgreSQL Buildfarm Client introduces several new features and fixes. Key additions include a PatchStack module for testing patch stacks on non-standard buildfarms, an ABI check module using abidw to detect ABI changes in installed headers, and a new branches_target config key for fetching branch data via a dedicated URL. Build system improvements make meson detection branch-name-agnostic. Cross-version upgrade handling gains compressed pg_upgrade dump files and drops pre-v10 upgrade testing in v20+. Protocol adjustments align with upstream libpq changes. Diagnostics improvements include better timeout reporting and preserving testrun directories for post-failure diagnosis. Multiple bug fixes address TAP-test duplication, git system settings interference, and proxy support in run_branches.pl. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [PgBouncer 1.26.0 released - Fixes three CVEs](https://daily.dev/posts/pgbouncer-1-26-0-released---fixes-three-cves-5uibkpxr4) · PostgreSQL · 0 upvotes · 0 comments --- Tags: [#postgresql](https://daily.dev/tags/postgresql) [View this post on daily.dev](https://daily.dev/posts/andrew-dunstan-s-postgresql-and-technical-blog-belatedly-announcing-release-21-of-the-postgresql--tyoyyurkg) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Andrew Dunstan's PostgreSQL and Technical blog: (Belatedly) Announcing Release 21 of the PostgreSQL Buildfarm Client","url":"https://daily.dev/posts/andrew-dunstan-s-postgresql-and-technical-blog-belatedly-announcing-release-21-of-the-postgresql--tyoyyurkg","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/andrew-dunstan-s-postgresql-and-technical-blog-belatedly-announcing-release-21-of-the-postgresql--tyoyyurkg"},"datePublished":"2026-07-11T13:47:28.614Z","dateModified":"2026-07-11T13:47:46.847Z","description":"Release 21 of the PostgreSQL Buildfarm Client introduces several new features and fixes. 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