Engineering: Heaps Do Lie — Debugging a Memory Leak in vLLM
Mistral AI News40 days agoTutorialMathis Felardos, a Mistral AI engineer, shares a technical deep-dive into tracking down a memory leak in vLLM, the widely adopted open-source LLM inference server. The investigation exposed a core frustration in systems debugging: heap profiling tools can actively mislead engineers rather than illuminate the true source of memory growth. The post offers practical engineering insight for teams operating LLM serving infrastructure in production.
Claude Fable 5 Is Relentlessly Proactive
Simon Willison's Weblog46 days agoCommentarySimon Willison reports that Claude Fable 5 showed striking initiative during a debugging session for Datasette Agent. Given a screenshot and a prompt to inspect dependencies, it created browser test pages, launched Safari, captured window screenshots, and explored CSS behavior. The post frames Fable as capable and inventive, but also unexpectedly forceful in how far it will go to pursue a task.
Heaps do lie: debugging a memory leak in vLLM
Mistral AI News50 days agoTutorialMistral AI published an engineering deep dive on a memory leak found during vLLM disaggregated serving tests. The leak appeared only with a specific stack involving Mistral Medium 3.1, NIXL, UCX, graph compilation, and P/D disaggregation, with RSS growing steadily despite heap profilers looking normal. The team used pmap, BPFtrace, and targeted GDB automation to trace the issue to UCX mmap hooks and applied configuration fixes plus a vLLM patch.
Trace any Vercel request from the CLI
Vercel Changelog74 days agoReleaseVercel’s changelog entry points to a new capability for tracing any Vercel request from the CLI. The original body was not provided, so exact commands, requirements, output fields, pricing, and limitations cannot be confirmed. Based on the title, the update is most relevant to developers debugging deployments, investigating production issues, and reducing context switching during request-level troubleshooting.
Vercel 推出「受保護的 Source Maps」：安全地在瀏覽器中進行生產環境除錯
Vercel Changelog75 days agoReleaseIn modern web development, JavaScript code deployed to production environments is typically minified and obfuscated to optimize loading performance. When…
Vercel Workflows 現已支援日誌過濾功能，調試多步驟工作流更輕鬆
Vercel Changelog104 days agoReleaseThe official Vercel Changelog has announced the release of a "Logs filtering" feature for Vercel Workflows — the product used to build persistent, multi-step…
Vercel 運行時日誌（Runtime Logs）現已支援查看特定錯誤代碼
Vercel Changelog127 days agoReleaseLeading cloud deployment platform Vercel has released an update adding the ability to "view specific error codes" within its Runtime Logs. Previously, when…
Vercel 推出全新設計的 Runtime Logs 搜尋與篩選功能
Vercel Changelog159 days agoReleaseOn February 18, 2026, Vercel announced a comprehensive redesign of the search and filtering interface for one of its platform's core features: Runtime Logs…
Vercel 推出 Vercel Agent：專案部署失敗時自動提供 AI 修復建議★ 75
Vercel Changelog160 days agoNew ToolVercel today (February 17, 2026) announced in its Changelog the launch of a new AI feature called "Vercel Agent," designed to address the "build failure" pain…
Vercel 推出 MCP 伺服器更新：AI Agent 現在可以直接存取運行期日誌 (Runtime Logs)★ 75
Vercel Changelog167 days agoReleaseVercel has recently made an important update to its MCP (Model Context Protocol) server, enabling AI Agents to directly access and analyze Runtime Logs from…
Vercel CLI `vercel logs` 命令針對 AI Agent 優化，支援歷史日誌查詢★ 70
Vercel Changelog167 days agoReleaseVercel has made an important optimization to the `vercel logs` command in its command-line interface (CLI). This update is aimed at improving the efficiency of…
Vercel 建置日誌（Build Logs）現已支援互動式連結
Vercel Changelog173 days agoReleaseVercel announced in a recent update that its platform's Build Logs now officially support "Interactive Links." In the past, when developers encountered errors…
Vercel Agent 智慧調查功能正式支援 Slack：直接在對話框中排查部署問題
Vercel Changelog180 days agoReleaseVercel announced on January 28, 2026 that the "Investigations" feature of its built-in AI assistant tool, "Vercel Agent," has been officially integrated with…
使用 CLI 透過 SSH 連線至運行中的 Vercel Sandboxes★ 75
Vercel Changelog193 days agoReleaseVercel has announced an important developer experience (DX) update in its Changelog: it is now possible to connect directly to running Vercel Sandboxes via SSH…
Vercel 運行時間日誌（Runtime Logs）現已支援顯示函式啟動類型（Function Start Type）
Vercel Changelog217 days agoReleaseVercel recently rolled out a practical update to its platform's Runtime Logs, officially introducing the "Function start type" display feature. In serverless…
Vercel 執行階段日誌（Runtime Logs）現已支援顯示 Referer 來源網址
Vercel Changelog227 days agoReleaseVercel has published an official update announcing that HTTP `Referer` header information has been formally added to the Runtime Logs of its platform services…
Vercel 運行時日誌現已支援重寫（Rewrites）與重定向（Redirects）記錄
Vercel Changelog234 days agoReleaseVercel recently announced in its changelog that the platform's Runtime Logs now officially support logging for Rewrites and Redirects. This update aims to…
Vercel Agent 現在可執行 AI 診斷分析，自動排查與修復線上錯誤★ 75
Vercel Changelog269 days agoReleaseVercel recently announced a major update to its platform's built-in AI assistant, "Vercel Agent," introducing the "AI investigations" feature. This feature is…
Vercel 運行時日誌（Runtime Logs）現已支援顯示快取詳細資訊 (Caching Details)
Vercel Changelog269 days agoReleaseVercel recently introduced an extremely practical feature for developers in a platform update: the direct integration of Caching Details within the Runtime…
Vercel Agent Investigations 進入公開測試：AI 代理助你自動排查與分析線上故障★ 70
Vercel Changelog277 days agoReleaseVercel officially announced that its new "Agent Investigations" feature has entered the Public Beta stage. This is an AI-assisted operations and debugging tool…
Vercel Observability 支援查詢外部 API 請求數據
Vercel Changelog306 days agoReleaseVercel has recently released an important update to its observability platform (Vercel Observability), allowing developers to directly query and analyze data…
Vercel 改進 Fluid Compute 中的未處理 Node.js 錯誤提示
Vercel Changelog410 days agoReleaseVercel recently made an important update to its internal "Fluid compute" infrastructure, focusing on improving the presentation and handling of unhandled…
Vercel 推出新功能：可針對嚴重函數錯誤（Fatal Function Errors）篩選運行時日誌
Vercel Changelog412 days agoNew ToolCloud hosting and deployment platform Vercel has announced a practical update to improve the debugging experience for developers: it is now possible to filter…
Vercel Observability 推出全新「快速操作」功能，大幅提升 Debug 與日誌分析效率
Vercel Changelog444 days agoReleaseVercel recently made an important upgrade to its built-in Observability tools, introducing the new "Quick Actions" feature. This new capability is designed to…
Vercel 推出 Session Tracing 功能：完整追蹤單一請求的生命週期
Vercel Changelog448 days agoReleaseThe Vercel official Changelog announced the launch of a new "Session Tracing" feature. This feature is designed to solve the difficulty of debugging modern web…
Vercel 推出 Logs 新功能：支援一鍵篩選開發者自身的請求
Vercel Changelog544 days agoReleaseVercel published an update on January 29, 2025, introducing a practical new feature for the Logs system on its platform: "Filter for your own requests in…
Vercel Functions 調整日誌限制：Pro 與 Enterprise 方案單行日誌上限提升至 64 KB
Vercel Changelog564 days agoReleaseVercel announced on January 9, 2025 an update to the logging limits for Vercel Functions (Serverless Functions) on its platform, aimed at providing developers…
Vercel 執行階段日誌現在支援依請求類型與 Vercel 資源進行篩選
Vercel Changelog566 days agoReleaseVercel has officially announced the introduction of a new filtering mechanism for Runtime Logs on its platform. For modern web developers, real-time and…
建構華麗神經網路的實用指南：給開發者的幾個簡單建議
Hugging Face Blog1,979 days agoOpinionThis classic blog post from Hugging Face explores the common mistakes developers make when building complex (fancy) neural networks, and the simple principles…
Vercel 推出全新改良版日誌系統（Refined Logging），大幅提升 Serverless 除錯效率
Vercel Changelog2,329 days agoReleaseVercel (releasing this update in March 2020) announced a major upgrade to its platform's logging system, introducing "Refined Logging." The core of this update…