Understanding Memory Hierarchy: Why Redis Uses RAM, Not Disk

In system design and performance optimization, memory hierarchy plays a crucial role in determining how fast data can be accessed. This blog explores the memory hierarchy pyramid, the latency differences between various storage types, and why Redis uses RAM instead of disk for ultra-fast performance.

Mar 12, 2025 - 05:03
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Understanding Memory Hierarchy: Why Redis Uses RAM, Not Disk

In system design and performance optimization, memory hierarchy plays a crucial role in determining how fast data can be accessed. This blog explores the memory hierarchy pyramid, the latency differences between various storage types, and why Redis uses RAM instead of disk for ultra-fast performance.