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DeWu Technology
DeWu Technology
Apr 14, 2023 · Backend Development

Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level

Async‑fork shifts the costly page‑table copying from Redis’s parent process to its child, allowing the parent to resume handling queries instantly and cutting snapshot‑induced latency spikes by over 98%, thereby dramatically improving tail latency during AOF rewrites, RDB backups, and master‑slave synchronizations.

Async-forkBackend DevelopmentMemory Database
0 likes · 21 min read
Async-fork: Mitigating Query Latency Spikes Incurred by the Fork-based Snapshot Mechanism from the OS Level
Laravel Tech Community
Laravel Tech Community
Nov 2, 2021 · Operations

Understanding Virtual Memory: Concepts, Paging, and Management in Linux

This article explains the fundamentals of virtual memory, including paging, page tables, swap, and Linux management commands, highlighting how virtual memory abstracts physical addresses, resolves process memory conflicts, and enhances security and data sharing while providing practical tips for monitoring and tuning memory usage.

Operating SystemPagingVirtual Memory
0 likes · 9 min read
Understanding Virtual Memory: Concepts, Paging, and Management in Linux