--- title: GitHub PR Stacks goes live, Nubank migrates... description: GitHub's stacked PRs feature is landing with early users reporting it's already changing how they work, while Nubank completed a zero-downtime migration of its... canonical: https://daily.dev/posts/github-pr-stacks-goes-live-nubank-migrates-135m-customer-payments-to-aurora-cskmmnkxy twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GitHub PR Stacks goes live, Nubank migrates 135M-customer payments to Aurora | daily.dev og:description: GitHub's stacked PRs feature is landing with early users reporting it's already changing how they work, while Nubank completed a zero-downtime migration of its... og:url: https://daily.dev/posts/github-pr-stacks-goes-live-nubank-migrates-135m-customer-payments-to-aurora-cskmmnkxy og:image: https://api.daily.dev/og/posts/cSKmmnkXY.png og:image:alt: GitHub PR Stacks goes live, Nubank migrates 135M-customer payments to Aurora 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. # GitHub PR Stacks goes live, Nubank migrates 135M-customer payments to Aurora **[Backend Digest](https://daily.dev/sources/backend_digest)** · 5 min read · 6 upvotes · 0 comments ## Summary GitHub's stacked PRs feature is landing with early users reporting it's already changing how they work, while Nubank completed a zero-downtime migration of its NuPay payment infrastructure to Amazon Aurora PostgreSQL, cutting query times from 13 minutes to seconds. Supabase Pipelines hit public alpha with Postgres CDC to BigQuery, adding automatic schema change detection. A Zhejiang University paper shows 1,000 synchronized GPUs can destabilize power grids, with no patch possible given the structural gap between datacenter and grid monitoring. ## Content **TLDR:** GitHub's stacked PRs feature is landing with early users reporting it's already changing how they work, while Nubank completed a zero-downtime migration of its NuPay payment infrastructure to Amazon Aurora PostgreSQL, cutting query times from 13 minutes to seconds. Supabase Pipelines hit public alpha with Postgres CDC to BigQuery, adding automatic schema change detection. A Zhejiang University paper shows 1,000 synchronized GPUs can destabilize power grids, with no patch possible given the structural gap between datacenter and grid monitoring. --- ## GitHub PR Stacks enters preview, early users report immediate workflow change GitHub's stacked diffs feature is now in preview with a waitlist open. Early access users including John Resig report landing five stacked PRs directly into a merge queue simultaneously. The feature removes the manual rebase-and-wait cycle that makes stacked development painful in practice, and teams with access say it's already changed how they structure work after just a day or two. [Read more](https://daily.dev/feed-by-ids?id=ki4PrFS47&id=kJGti30Nb&id=VvrL28v0Z) ## Nubank migrates NuPay payments for 135M customers to Aurora PostgreSQL, 1,900x query improvement in specific cases Nubank moved its NuPay payment infrastructure from self-managed PostgreSQL to Amazon Aurora PostgreSQL to fix queries taking over 13 minutes and replication lag exceeding 4 minutes at peak. Aurora's shared storage architecture and Query Plan Management delivered up to 1,900x query performance improvement in specific cases and 15-20% average improvement across production workloads. Replication lag dropped from 3-4 minutes to a few seconds, maintenance windows shrank from 11 hours to 1-1.5 hours, and consolidating from three instances to two cut costs by 25%. The actual cutover took just over an hour against a 5-hour maintenance window using AWS DMS with 10 parallel tasks and CDC. [Read more](https://daily.dev/posts/uHKWMXH9s) ## Supabase Pipelines public alpha: Postgres CDC to BigQuery with automatic schema change support Supabase Pipelines is now in public alpha, replicating Postgres data to BigQuery in near real-time using logical replication. The headline addition is automatic schema change detection — adding, removing, or renaming columns and changing nullability now propagates without manual intervention, which was the main operational pain point before. Initial sync is now parallelized across and within tables. Pricing is $0.053/hour per active pipeline plus $0.60/GB for initial copy and $3/GB for ongoing replication. ClickHouse, Snowflake, and DuckLake are next. [Read more](https://daily.dev/posts/8Mkx7whU4) ## Bit2Watt: 1,000 synchronized GPUs can destabilize power grids, no patch available Researchers at Zhejiang University published Bit2Watt, showing a malicious cloud tenant can weaponize GPU workloads to attack electrical infrastructure by rapidly toggling compute states to create oscillating power draws. Simulations show 1,000 synchronized GPUs wasted nearly half available current on a small solar-fed grid, and a model of a European transmission network shed 81% of load in a cascading failure. The attack hides inside a legitimate AI training run. There's no fix — standard power monitoring is too slow to detect the oscillations, and datacenters and grid operators have no shared alerting layer. A reverse variant called Watt2Bit runs the other direction: grid stress can overheat servers and cause denial of service. [Read more](https://daily.dev/posts/n3awiAyBK) --- ## Also notable - **Koyeb acquired by Mistral AI to build Mistral Compute, free Starter plan removed:** Mistral AI is acquiring Koyeb to build out Mistral Compute, its AI infrastructure offering backed by 18,000 Nvidia Blackwell GPUs and a $1.4B datacenter investment in Sweden — existing customers continue uninterrupted but the free Starter plan is being removed and new users must subscribe to paid plans. [Read more](https://daily.dev/posts/s9r5UmHvp) - **Node.js security releases for 26.x, 24.x, and 22.x scheduled July 27 with HIGH severity issues:** The Node.js project has announced security releases across all active release lines (26.x, 24.x, 22.x) for Monday July 27, 2026, with the highest severity rated HIGH — patch before end of week. [Read more](https://daily.dev/posts/WIFm2AAxV) - **RFC 10008 standardizes HTTP QUERY method after 16 years, introduces cache poisoning attack surface:** The IETF published RFC 10008 in June 2026, giving HTTP a safe, idempotent, body-carrying QUERY method that caches on both URI and body — but legacy proxies ignoring the body in cache key calculation and JSON duplicate-key desynchronization between cache and backend create two new web cache poisoning vectors worth auditing now. [Read more](https://daily.dev/feed-by-ids?id=LZUz1bRs8&id=SP7tNM5fm) - **NuGet typosquat 'Newtonsoftt.Json.Net' rigs betting game results, exfiltrates to C2 via fake Seq logging:** JFrog found a targeted NuGet package impersonating Newtonsoft.Json that uses HarmonyLib to patch a betting platform's GenerateGameResult method on a deterministic schedule only the attacker knows, with later versions exfiltrating rigged results to a C2 server disguised as Seq structured logging traffic — remediation requires removing the package, purging caches, and blocking the C2 IP. [Read more](https://daily.dev/posts/rOHtlqazt) - **Postgres SKIP LOCKED queue failed at 400 jobs/sec spike: 650k-row backlog, 4.2M dead tuples, 88% CPU:** A six-week production trial replacing Redis with a Postgres SKIP LOCKED job queue worked well at steady ~12 jobs/sec but collapsed under a marketing spike to ~400 jobs/sec — autovacuum couldn't keep up with heap churn from status transitions, idle-in-transaction workers caused 4.2M dead tuples, and connection pool exhaustion forced an emergency rollback to a hybrid architecture with Redis Streams for burst workloads. ## Similar posts on daily.dev - [Migrating mission-critical payments at Nubank to Amazon Aurora PostgreSQL](https://daily.dev/posts/migrating-mission-critical-payments-at-nubank-to-amazon-aurora-postgresql-uhkwmxh9s) · AWS Database Blog · 5 upvotes · 0 comments --- Tags: [#aws](https://daily.dev/tags/aws), [#github](https://daily.dev/tags/github), [#database](https://daily.dev/tags/database), [#postgresql](https://daily.dev/tags/postgresql), [#change-data-capture](https://daily.dev/tags/change-data-capture) [View this post on daily.dev](https://daily.dev/posts/github-pr-stacks-goes-live-nubank-migrates-135m-customer-payments-to-aurora-cskmmnkxy) ```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":"DiscussionForumPosting","mainEntityOfPage":"https://daily.dev/posts/github-pr-stacks-goes-live-nubank-migrates-135m-customer-payments-to-aurora-cskmmnkxy","headline":"GitHub PR Stacks goes live, Nubank migrates 135M-customer payments to Aurora","text":"GitHub's stacked PRs feature is landing with early users reporting it's already changing how they work, while Nubank completed a zero-downtime migration of its NuPay payment infrastructure to Amazon Aurora PostgreSQL, cutting query times from 13 minutes to seconds. 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