Nikolay and Michael discuss zero-downtime schema migrations — why they're a challenge, a variety of different cases, and some things you can do to achieve them. Here are links to a few things we mentioned: Comparison of JOINS: MongoDB vs. PostgreSQL (blog post by Michael Stonebraker and Álvaro Hernández)Common DB schema change mistakes (blog post by Nikolay)lock_timeout and retries (blog post by Nikolay)lock_timeoutFast Column Creation with Defaults (blog post by Brandur)Database Schema Changes Without Downtime (new version of blog post by Braintree)Zero-downtime Postgres migrations - the hard parts (blog post from GoCardless)GitLab migration_helpers.rb GitLab migration style guidedblab ~~~What did you like or not like? What should we discuss next time? Let us know via a YouTube comment, on social media, or by commenting on our Google doc!If you would like to share this episode, here's a good link (and thank you!)~~~Postgres FM is brought to you by:Nikolay Samokhvalov, founder of Postgres.aiMichael Christofides, founder of pgMustardWith special thanks to:Jessie Draws for the amazing artwork 

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