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      <title>缓存为何总有淘汰的那一刻？从Belady最优到SIEVE的六十年算法博弈</title>
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      <description>深入解析缓存淘汰算法的演进历程：从1966年Belady最优算法的理论上限，到LRU的k-竞争比证明，再到ARC的自适应平衡、LIRS的IRR度量，以及2024年SIEVE算法的&amp;#34;懒提升快淘汰&amp;#34;创新。结合Redis近似LRU、MySQL InnoDB中点插入、Linux内核Clock-Pro等实际案例，揭示为什么没有完美的缓存淘汰算法，只有最适合特定场景的权衡。</description>
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