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Deepin Linux
Deepin Linux
Feb 13, 2025 · Fundamentals

Understanding the Linux Kernel Buffer Cache: Structure, Initialization, and Management

This article explains the role of the Linux kernel buffer cache in file I/O, describes its data structures such as buffer_head, details how buffers are organized with hash tables and free lists, and walks through initialization, allocation, release, synchronization, and optimization techniques with code examples.

Buffer CacheFile SystemMemory Management
0 likes · 28 min read
Understanding the Linux Kernel Buffer Cache: Structure, Initialization, and Management
Java Captain
Java Captain
Apr 18, 2020 · Databases

Understanding Linux Memory Usage, Buffer Cache, and SQL Join Optimization

This article explains how to inspect and clear Linux memory buffers, interprets the fields shown by the free command, and then dives into SQL join types, performance‑impacting factors such as join_buffer_size, and practical optimization techniques like indexing and denormalization.

Buffer CacheDatabase PerformanceMemory Management
0 likes · 7 min read
Understanding Linux Memory Usage, Buffer Cache, and SQL Join Optimization
Architecture Digest
Architecture Digest
Mar 23, 2020 · Databases

Understanding Linux Buffer Cache and SQL Join Performance

This article explains how Linux memory statistics (free, top) report buffer/cache usage, how to clear it with sync and drop_caches, and then dives into SQL join concepts, types, optimization techniques, and MySQL join algorithms such as nested loop and block nested loop, highlighting their impact on performance.

Buffer CacheDatabase PerformanceMemory Management
0 likes · 7 min read
Understanding Linux Buffer Cache and SQL Join Performance
Qunar Tech Salon
Qunar Tech Salon
May 11, 2016 · Operations

Understanding the Linux free Command, Buffers/Cache and Their Reclamation

This article explains how the Linux free command reports memory usage, clarifies the roles of buffer cache and page cache, demonstrates which cache memory can be reclaimed, and shows practical tests using tmpfs, shared memory, and mmap with code examples.

Buffer CacheMMAPMemory Management
0 likes · 17 min read
Understanding the Linux free Command, Buffers/Cache and Their Reclamation