{"id":9792,"date":"2025-09-17T11:49:54","date_gmt":"2025-09-17T09:49:54","guid":{"rendered":"https:\/\/www.credativ.de\/?p=9792"},"modified":"2025-09-17T11:49:54","modified_gmt":"2025-09-17T09:49:54","slug":"elephant-in-oceanium-insights-from-pgday-lowlands-2025","status":"publish","type":"post","link":"https:\/\/www.credativ.de\/en\/blog\/postgresql-en\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\/","title":{"rendered":"Elephant in Oceanium: Insights from PGDay Lowlands 2025"},"content":{"rendered":"<div>\n<div>\n<p>On Friday, September 12th, we attended <a href=\"https:\/\/2025.pgday.nl\/\"><strong>PGDay Lowlands 2025<\/strong><\/a> in Rotterdam and it was definitely a conference to remember. It took place at the Blijdorp Zoo in Rotterdam, in the Oceanium building. It was an unforgettable experience to discuss databases while surrounded by various fish, sharks, and rays. Our company <strong>credativ GmbH<\/strong>, as an enterprise-grade open-source support provider for PostgreSQL, was a sponsor of the event and we had a booth there to meet attendees. Our CTO Alexander Wirt and our PostgreSQL expert Joop Boonen met visitors on our booth and discussed with them many technical aspects of PostgreSQL.<\/p>\n<p><a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9797\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-225x300.jpeg\" alt=\"\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-225x300.jpeg 225w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-768x1024.jpeg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-1152x1536.jpeg 1152w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-600x800.jpeg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289-180x240.jpeg 180w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289.jpeg 1280w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n<\/div>\n<\/div>\n<h4>My Talk about Database Corruption<\/h4>\n<div>\n<div>\n<p>I represented our company also as a speaker, giving a talk titled \u201c<a href=\"https:\/\/www.postgresql.eu\/events\/pgdaynl2025\/sessions\/session\/6652\/slides\/720\/postgresql_database_corruption.pdf\">Database in Distress: Testing and Repairing Different Types of Database Corruption<\/a>.\u201d This talk summarized my experiences with database corruption. I\u2019ve seen many corruption issues while repairing live systems. So I built a Python corruption simulator, which surgically damages selected parts of a data block in a testing table, and I used different PostgreSQL extensions to analyze these cases. The talk walked through examples of page-level corruption and discussed strategies for recovery. At the end of my talk, I discussed potential new Postgres features or settings that could make repairs less painful in the future. After the talk, many attendees came to our booth to discuss their experiences with specific corruption cases, which also sparked greater interest in credativ\u2019s services.<\/p>\n<p><a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9798\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-300x200.jpg 300w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-1024x683.jpg 1024w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-768x512.jpg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-1536x1024.jpg 1536w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-600x400.jpg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-610x407.jpg 610w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce-180x120.jpg 180w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1cbcceb40086d5ce.jpg 1731w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<\/div>\n<h4>Other Talks and Highlights<\/h4>\n<div>The whole day was packed with <a href=\"https:\/\/www.postgresql.eu\/events\/pgdaynl2025\/schedule\/\">great sessions<\/a>. A few that stood out to me:<\/div>\n<ul>\n<li><strong data-start=\"1763\" data-end=\"1782\">Opening remarks<\/strong> \u2013 Boriss Mejias, as the organizer and guide, opened the conference by emphasizing the value of the community around PostgreSQL. Personally,<\/li>\n<li><strong>Jimmy Angelakos &#8211; \u201cHow Do We Get Postgres to the Next Level?\u201d<\/strong><br \/>\nThis talk was inspired by the one given by Simon Riggs in December 2023 in Prague. Jimmy offered different insights to keep improving PostgreSQL by making it more modular, boosting test coverage, creating a team specialized only in performance issues, and adding some new cutting-edge features. In particular, he mentioned goals like 100% regression testing, online major-version upgrades, and optional multi-threading \u2013 all part of a roadmap to solidify PostgreSQL\u2019s lead.<\/li>\n<li><strong>Gul\u00e7in Y\u0131ld\u0131r\u0131m Jelinek &#8211; \u201cAnatomy of Table-Level Locks in PostgreSQL\u201d<\/strong><br \/>\nThis was an intermediate deep dive into DDL locks: explaining Access Share, Exclusive, Access Exclusive locks, and how they queue during ALTER or DROP commands. She showed how to interpret lock waits and deadlocks, and shared practical tips (like using online schema-change tools) to achieve near-zero downtime during migrations.<\/li>\n<li><strong> Chris Ellis &#8211; \u201cFun With UUIDs\u201c<\/strong><br \/>\nI very much enjoyed this talk. UUIDs have a bad reputation, mostly because randomly allocated UUIDs negatively affect indexes. But UUIDs also give us 16 bytes of space to play with, which can be to our advantage. Chris showed how to use the space of UUIDs to structure and encode data within identifiers to distinguish tenants, shards, or partitions.<\/li>\n<li><strong>Johannes Paul &#8211; \u201cActual trees, not b-trees \u2013 how I found PostgreSQL through PostGIS\u201d<\/strong><br \/>\nSpeaker charmed the auditorium with the story of a neighbor\u2019s climate-monitoring project mapping real-life tree data across Germany. Because he needed efficient geographic searches, Johannes switched to using PostGIS on PostgreSQL for his web app.<\/li>\n<li><strong>Dirk Krautschick &#8211; \u201cBeyond Postgres \u2013 Insights about the PostgreSQL Extensibility\u201d<\/strong><br \/>\nDirk emphasized that Postgres is designed to be lightweight yet powerful via extensions. He explained the extension framework and sketched out how to write a new extension for extra functionality.<\/li>\n<li><strong>Andreas Scherbaum &#8211; \u201cWhat I learned interviewing the PostgreSQL Community\u201d<\/strong><br \/>\nI enormously enjoyed this talk . Andreas has been running the postgresql.life interview series and distilled some fun stats from them. It was a charming \u201cstate of the community\u201d talk with interesting charts and quotes.<\/li>\n<li>The final debate on \u201c<strong>Autotuning in Postgres<\/strong>\u201d was also very interesting. The PRO side (Luigi Nardi, Gianni Ciolli) argued that autotuning tools can save DBAs hours of manual work. But the CON side (Mayuresh S. Bagayatkar, Guy Gyles) countered that blindly auto-changing settings might over-tune and even hurt performance, since machines lack the human context for every deployment and current AI has no concept of truth.<\/li>\n<\/ul>\n<h4>Reflections<\/h4>\n<div>\n<p>PGDay Lowlands 2025 was a fantastic experience. The mix of deep technical content and the relaxed zoo setting made for a friendly, engaging atmosphere. It was great to meet so many users and contributors and to hear about real-world problems, and even pick up new ideas for future work. I\u2019m proud that credativ could play a role in such a great community event. PostgreSQL continues to grow and evolve, with people thinking hard about different issues, from locks and extensions to automatic tuning, and the community\u2019s energy is truly inspiring. <strong>We are already looking forward to PGDay Lowlands 2026!<br \/>\n<\/strong><\/p>\n<\/div>\n<div>\n<p><a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9800\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-300x135.jpg\" alt=\"\" width=\"300\" height=\"135\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-300x135.jpg 300w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-1024x461.jpg 1024w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-768x346.jpg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-1536x691.jpg 1536w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-2048x922.jpg 2048w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-600x270.jpg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_083029-180x81.jpg 180w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><br \/>\n<\/a><br \/>\n<a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9801\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-300x135.jpg\" alt=\"\" width=\"300\" height=\"135\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-300x135.jpg 300w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-1024x461.jpg 1024w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-768x346.jpg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-1536x691.jpg 1536w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-2048x922.jpg 2048w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-600x270.jpg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_161841-180x81.jpg 180w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<\/div>\n<div>\n<p><a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9802\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-300x135.jpg\" alt=\"\" width=\"300\" height=\"135\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-300x135.jpg 300w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-1024x461.jpg 1024w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-768x346.jpg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-1536x691.jpg 1536w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-2048x922.jpg 2048w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-600x270.jpg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_163921-180x81.jpg 180w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p><a href=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-9799\" src=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-300x135.jpg\" alt=\"\" width=\"300\" height=\"135\" srcset=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-300x135.jpg 300w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-1024x462.jpg 1024w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-768x346.jpg 768w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-1536x693.jpg 1536w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-2048x924.jpg 2048w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-600x271.jpg 600w, https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/IMG_20250912_073019-180x81.jpg 180w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>Photos (c) credativ GmbH or PG Day Lowlands organizers<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>On Friday, September 12th, we attended PGDay Lowlands 2025 in Rotterdam and it was definitely a conference to remember. It took place at the Blijdorp Zoo in Rotterdam, in the Oceanium building. It was an unforgettable experience to discuss databases while surrounded by various fish, sharks, and rays. Our company credativ GmbH, as an enterprise-grade [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_improvement_type_select":"improve_an_existing","_thumb_yes_seoaic":false,"_frame_yes_seoaic":false,"seoaic_generate_description":"","seoaic_improve_instructions_prompt":"","seoaic_rollback_content_improvement":"","seoaic_idea_thumbnail_generator":"","thumbnail_generated":false,"thumbnail_generate_prompt":"","seoaic_article_description":"","seoaic_article_subtitles":[],"footnotes":""},"categories":[1884,1708],"tags":[1794],"class_list":["post-9792","post","type-post","status-publish","format-standard","hentry","category-events-en","category-postgresql-en","tag-pgday-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.6 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Elephant in Oceanium: Insights from PGDay Lowlands 2025 - credativ\u00ae<\/title>\n<meta name=\"description\" content=\"PGDay Lowlands 2025 was an unforgettable experience. Meet experts and learn more about PostgreSQL and database corruption.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.credativ.de\/en\/blog\/postgresql-en\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Elephant in Oceanium: Insights from PGDay Lowlands 2025\" \/>\n<meta property=\"og:description\" content=\"PGDay Lowlands 2025 was an unforgettable experience. Meet experts and learn more about PostgreSQL and database corruption.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.credativ.de\/en\/blog\/postgresql-en\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\/\" \/>\n<meta property=\"og:site_name\" content=\"credativ\u00ae\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/credativDE\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-09-17T09:49:54+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.credativ.de\/wp-content\/uploads\/2025\/09\/1757671612289.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"1706\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Josef Machytka\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@credativde\" \/>\n<meta name=\"twitter:site\" content=\"@credativde\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Josef Machytka\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/\"},\"author\":{\"name\":\"Josef Machytka\",\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/#\\\/schema\\\/person\\\/b5f03833b09ed0acd1c8d3307d05bd1a\"},\"headline\":\"Elephant in Oceanium: Insights from PGDay Lowlands 2025\",\"datePublished\":\"2025-09-17T09:49:54+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/\"},\"wordCount\":801,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.credativ.de\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/1757671612289-225x300.jpeg\",\"keywords\":[\"PGDay\"],\"articleSection\":[\"Events\",\"PostgreSQL\u00ae\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/\",\"url\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/\",\"name\":\"Elephant in Oceanium: Insights from PGDay Lowlands 2025 - credativ\u00ae\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.credativ.de\\\/en\\\/blog\\\/postgresql-en\\\/elephant-in-oceanium-insights-from-pgday-lowlands-2025\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.credativ.de\\\/wp-content\\\/uploads\\\/2025\\\/09\\\/1757671612289-225x300.jpeg\",\"datePublished\":\"2025-09-17T09:49:54+00:00\",\"description\":\"PGDay Lowlands 2025 was an unforgettable experience. 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