Dec 8, 2020 · Backend Development

How Java's ConcurrentHashMap Delivers High‑Performance Thread Safety

This article explains the internal design of Java's ConcurrentHashMap, covering its evolution from JDK7 to JDK8, the segment‑based locking mechanism, lock‑free reads, CAS operations, table resizing, treeification, and the key classes and methods that enable efficient concurrent access while maintaining thread safety.

CASConcurrentHashMapLock Splitting

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How Java's ConcurrentHashMap Delivers High‑Performance Thread Safety

Architect

Jun 22, 2016 · Databases

Introduction to InnoDB Row Locks, Splitting, Inheritance, and Migration

This article explains InnoDB row lock types, including shared and exclusive locks and GAP variants, describes how locks split, inherit, and migrate during B‑tree operations, provides code examples and SQL demonstrations, and discusses related bugs and lock compatibility.

Database InternalsInnoDBLock Splitting

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Introduction to InnoDB Row Locks, Splitting, Inheritance, and Migration