Jan 23 · 12 min read · Introduction Have you ever wondered how your system can run dozens of browser tabs, an IDE, music playback, background services, and even Docker containers—all on 8 GB or 16 GB of RAM? It can seem like the machine is doing more than the hardware shou...
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Oct 9, 2025 · 9 min read · 🧩 Introduction: What Would the World Be Like Without an Operating System? Imagine your computer without Windows, macOS, or Linux.You turn it on and are greeted with a blank screen.If you want to calculate 2 + 2, you have to tell the CPU directly:Put...
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Jul 28, 2025 · 2 min read · As a developer working on a low-RAM Linux laptop (4GB or 8GB), I was constantly running into performance issues. Every time I fired up Next.js, opened VSCode, or launched the Brave browser, my system slowed down—or worse, froze entirely. After some d...
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Jul 7, 2025 · 9 min read · Modern software performance is deeply influenced by how efficiently memory is accessed. The full story of memory access latency involves multiple layers → from CPU caches to virtual memory translation, and finally to physical DRAM. This article expla...
Join discussionJun 30, 2025 · 2 min read · Difficulty: Advanced Reading Time: 11 min read Last Updated: June 30, 2025 Ever wondered how your computer knows where to find the data you ask for? Behind every memory access, there’s a hidden translator: the Memory Management Unit (MMU). And to ke...
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Jun 11, 2025 · 1 min read · 虛擬記憶體的基本概念 在現代作業系統中，虛擬記憶體（Virtual Memory）是一項重要的記憶體管理技術。它的主要用途是讓系統能夠執行超過實體記憶體（RAM）容量的程式。當實體記憶體不足時，作業系統會將暫時不使用的資料從記憶體移到硬碟上的特定區域，需要時再載入回來，這個過程稱為「記憶體交換」（Memory Swapping）。 虛擬記憶體不僅解決了記憶體不足的問題，還提供了記憶體保護機制，讓每個程式都擁有獨立的記憶體空間，避免程式之間互相干擾。 macOS 的 Swap 機制 在 macOS...
Join discussionNov 1, 2024 · 15 min read · In the world of computing, ensuring security, privacy, and efficient management of resources are some of the most significant challenges faced by modern technology. Virtual memory and virtual machines (VMs) play crucial roles in solving these challen...
Join discussionJan 8, 2024 · 5 min read · Memory management is a fundamental aspect of modern computing, essential for the efficient operation of your computer. It's the process that your operating system (OS) uses to control and coordinate how the computer's memory is allocated among variou...
Join discussionDec 8, 2023 · 4 min read · This article is a summary of Chapter 5 of: Yazawa, H. (2015). 程序是怎么跑起来的[How Program Works] (L. Fengjun, Trans.). People's Posts and Telecommunications Press Programs are only execued in memory The first thing to note about in this section is that pro...
Join discussionMay 11, 2023 · 1 min read · situation ERROR: [1] bootstrap checks failed [1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] resolution sysctl -a | grep vm.max_map_countvm.max_map_count = 262144
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