13h ago · 12 min read · If you've ever stared at a multithreaded program that hangs forever, spins uselessly at 100% CPU, or mysteriously crashes once a week — welcome to the wonderful hell of concurrency bugs. This post unp
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2d ago · 10 min read · Concurrency is one of those topics that feels deceptively simple until it bites you at 3 AM. You've got multiple threads, they share some data, and suddenly your application freezes, produces garbage
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May 7 · 8 min read · If you've ever watched two people in a narrow hallway politely stepping left and right in perfect unison, never actually getting past each other — congratulations, you've witnessed a human deadlock. N
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Dec 7, 2025 · 4 min read · 在上一篇文說到了：三種讀取異常，也介紹了四種隔離等級，如果是第一次接觸到這些概念的人一定會有疑問： Q：既然 RR 已經保證『可重複讀』了，為什麼搶票系統還是會超賣？資料庫不是隔離了嗎？ A：隔離級別（透過 MVCC）通常只保證「你看得到的資料」是一致的（快照），但它擋不住多個人同時對同一筆資料進行「寫入」 回到搶票案例： A 讀取 (Select)：MVCC 給了 A 一張「剩餘 1 張」的照片。 B 讀取 (Select)：MVCC 給了 B 一張「剩餘 1 張」的照片。 A 寫入 (...
Join discussionNov 24, 2025 · 5 min read · Concurrency is about multiple threads executing at the same time. Without proper handling, threads can interfere with each other, causing race conditions and data corruption. What's a race condition? When two threads try to read and modify the same d...
Join discussionNov 16, 2025 · 5 min read · Concurrency testing (also known as concurrent testing) is a technique used to detect possible defects while multiple users or concurrent users in performance testing scenarios access an application simultaneously. In software quality assurance and co...
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Nov 3, 2025 · 7 min read · A deep dive into one of computing's most fascinating timing bugs What's a Leap Second? Before we dive into the chaos, let's understand what caused it: Earth's rotation is slightly irregular - Earthquakes, tides, and other geological phenomena affec...
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Oct 20, 2025 · 7 min read · Introduction: Ever had your app freeze out of nowhere, and you're just left sitting in front of the screen wondering what happened? Then chances are, you've encountered a deadlock—one of the sneakiest and most infuriating bugs in concurrent programmi...
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