Feb 22, 2024 · Databases

MongoDB Lock Mechanisms and Implementation Details

MongoDB’s locking system uses a hierarchical resource model with four lock modes, RAII‑style acquisition classes, ticket‑based throttling, and a bucketed lock manager that employs bit‑mask conflict checks and priority flags to grant exclusive locks promptly and prevent starvation.

Lock ManagerLocksRAII

0 likes · 42 min read

MongoDB Lock Mechanisms and Implementation Details

Tencent Database Technology

Mar 8, 2021 · Databases

Introduction to the InnoDB Lock Module and Its Performance Optimizations

This article provides a comprehensive overview of MySQL InnoDB's lock subsystem, describing its data structures, lock compatibility matrices, lock/unlock workflows, lock splitting, inheritance and migration, and presents several optimization techniques such as avoiding lock_sys mutex, asynchronous deadlock detection, and lock_sys mutex sharding to alleviate contention in MySQL 5.7 and later versions.

InnoDBLock Managerconcurrency

0 likes · 13 min read

Introduction to the InnoDB Lock Module and Its Performance Optimizations