{"id":184862,"date":"2024-11-10T16:45:18","date_gmt":"2024-11-10T08:45:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/184862\/"},"modified":"2024-11-10T16:45:19","modified_gmt":"2024-11-10T08:45:19","slug":"%e4%bd%bf%e7%94%a8redis%e5%af%a6%e7%8f%belru%e7%ae%97%e6%b3%95%ef%bc%88%e5%9f%ba%e6%96%bcredis%e5%af%a6%e7%8f%belru%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/184862\/","title":{"rendered":"\u4f7f\u7528Redis\u5be6\u73feLRU\u7b97\u6cd5\uff08\u57fa\u65bcredis\u5be6\u73feLRU\uff09"},"content":{"rendered":"

\u4f7f\u7528Redis\u5be6\u73feLRU\u7b97\u6cd5\uff08\u57fa\u65bcRedis\u5be6\u73feLRU\uff09<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u5b58\u5132\u6578\u64da\u6210\u70ba\u4e86\u958b\u767c\u8005\u548c\u7cfb\u7d71\u67b6\u69cb\u5e2b\u9762\u81e8\u7684\u4e00\u5927\u6311\u6230\u3002\u7279\u5225\u662f\u5728\u9ad8\u6027\u80fd\u61c9\u7528\u4e2d\uff0c\u7de9\u5b58\u6280\u8853\u7684\u4f7f\u7528\u8b8a\u5f97\u5c24\u70ba\u91cd\u8981\u3002Redis\u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u5167\u5b58\u6578\u64da\u5eab\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u7d50\u69cb\u548c\u529f\u80fd\uff0c\u5176\u4e2dLRU\uff08Least Recently Used\uff09\u7b97\u6cd5\u7684\u5be6\u73fe\u5c24\u70ba\u53d7\u5230\u95dc\u6ce8\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528Redis\u5be6\u73feLRU\u7b97\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u4ec0\u9ebc\u662fLRU\u7b97\u6cd5\uff1f<\/h2>\n

LRU\u7b97\u6cd5\u662f\u4e00\u7a2e\u5e38\u7528\u7684\u7de9\u5b58\u66ff\u63db\u7b56\u7565\uff0c\u65e8\u5728\u4fdd\u6301\u6700\u5e38\u7528\u7684\u6578\u64da\u5728\u7de9\u5b58\u4e2d\uff0c\u800c\u5c07\u4e0d\u5e38\u7528\u7684\u6578\u64da\u79fb\u9664\u3002\u5176\u57fa\u672c\u539f\u7406\u662f\uff1a\u7576\u7de9\u5b58\u9054\u5230\u5bb9\u91cf\u9650\u5236\u6642\uff0c\u6700\u4e45\u672a\u88ab\u4f7f\u7528\u7684\u6578\u64da\u5c07\u88ab\u522a\u9664\u3002\u9019\u7a2e\u7b56\u7565\u80fd\u5920\u6709\u6548\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u80fd\u5920\u4fdd\u8b49\u6700\u5e38\u7528\u7684\u6578\u64da\u80fd\u5920\u5feb\u901f\u8a2a\u554f\u3002<\/p>\n

Redis\u4e2d\u7684LRU\u5be6\u73fe<\/h2>\n

Redis\u5167\u5efa\u4e86\u5c0dLRU\u7b97\u6cd5\u7684\u652f\u6301\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u5728\u61c9\u7528\u4e2d\u4f7f\u7528\u9019\u4e00\u7b56\u7565\u3002Redis\u4f7f\u7528\u4e00\u7a2e\u7a31\u70ba\u201c\u8fd1\u4f3cLRU\u201d\u7684\u7b97\u6cd5\u4f86\u7ba1\u7406\u5167\u5b58\uff0c\u9019\u610f\u5473\u8457\u5b83\u4e0d\u6703\u7cbe\u78ba\u5730\u8ffd\u8e64\u6bcf\u500b\u9375\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u800c\u662f\u5b9a\u671f\u96a8\u6a5f\u6aa2\u67e5\u4e00\u90e8\u5206\u9375\u4f86\u6c7a\u5b9a\u54ea\u4e9b\u9375\u61c9\u8a72\u88ab\u522a\u9664\u3002<\/p>\n

\u914d\u7f6eRedis\u7684LRU\u7b56\u7565<\/h3>\n

\u8981\u5728Redis\u4e2d\u555f\u7528LRU\u7b56\u7565\uff0c\u60a8\u9700\u8981\u8a2d\u7f6e\u6700\u5927\u5167\u5b58\u9650\u5236\u548c\u76f8\u61c9\u7684\u9a45\u9010\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u914d\u7f6eRedis\u4ee5\u4f7f\u7528LRU\u7b97\u6cd5\u7684\u6b65\u9a5f\uff1a<\/p>\n

maxmemory 100mb\nmaxmemory-policy allkeys-lru\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07Redis\u7684\u6700\u5927\u5167\u5b58\u9650\u5236\u8a2d\u7f6e\u70ba100MB\uff0c\u4e26\u9078\u64c7\u201callkeys-lru\u201d\u4f5c\u70ba\u9a45\u9010\u7b56\u7565\uff0c\u9019\u610f\u5473\u8457\u7576\u5167\u5b58\u9054\u5230\u9650\u5236\u6642\uff0cRedis\u5c07\u6839\u64daLRU\u7b97\u6cd5\u522a\u9664\u6700\u5c11\u4f7f\u7528\u7684\u9375\u3002<\/p>\n
\u4f7f\u7528Redis\u7684LRU\u793a\u4f8b<\/h3>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528Redis\u4f86\u5be6\u73feLRU\u7de9\u5b58\uff1a<\/p>\n
import redis\n\n# \u9023\u63a5\u5230Redis\u670d\u52d9\u5668\nr = redis.StrictRedis(host='localhost', port=6379, db=0)\n\n# \u8a2d\u7f6e\u6700\u5927\u5167\u5b58\nr.config_set('maxmemory', '100mb')\nr.config_set('maxmemory-policy', 'allkeys-lru')\n\n# \u6dfb\u52a0\u6578\u64da\u5230\u7de9\u5b58\nfor i in range(10):\n    r.set(f'key{i}', f'value{i}')\n\n# \u6a21\u64ec\u8a2a\u554f\nprint(r.get('key0'))  # \u8a2a\u554fkey0\nprint(r.get('key1'))  # \u8a2a\u554fkey1\n\n# \u6dfb\u52a0\u66f4\u591a\u6578\u64da\uff0c\u89f8\u767cLRU\nfor i in range(10, 20):\n    r.set(f'key{i}', f'value{i}')\n\n# \u6aa2\u67e5\u54ea\u4e9b\u9375\u4ecd\u7136\u5b58\u5728\nfor i in range(20):\n    print(f'key{i}: {r.get(f\"key{i}\")}')\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u9023\u63a5\u5230Redis\u670d\u52d9\u5668\uff0c\u7136\u5f8c\u8a2d\u7f6e\u6700\u5927\u5167\u5b58\u548c\u9a45\u9010\u7b56\u7565\u3002\u63a5\u8457\uff0c\u6211\u5011\u6dfb\u52a0\u4e86\u4e00\u4e9b\u9375\u503c\u5c0d\u5230\u7de9\u5b58\u4e2d\uff0c\u4e26\u6a21\u64ec\u4e86\u4e00\u4e9b\u8a2a\u554f\u3002\u7576\u6211\u5011\u6dfb\u52a0\u66f4\u591a\u7684\u6578\u64da\u6642\uff0cRedis\u5c07\u6839\u64daLRU\u7b97\u6cd5\u81ea\u52d5\u522a\u9664\u6700\u5c11\u4f7f\u7528\u7684\u9375\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u4f7f\u7528Redis\u5be6\u73feLRU\u7b97\u6cd5\u662f\u4e00\u7a2e\u9ad8\u6548\u7684\u7de9\u5b58\u7ba1\u7406\u7b56\u7565\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u9ad8\u6027\u80fd\u61c9\u7528\u4e2d\u6709\u6548\u5730\u7ba1\u7406\u5167\u5b58\u3002\u901a\u904e\u7c21\u55ae\u7684\u914d\u7f6e\u548c\u4ee3\u78bc\u5be6\u73fe\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u5229\u7528Redis\u7684\u5f37\u5927\u529f\u80fd\u4f86\u63d0\u5347\u61c9\u7528\u7684\u6027\u80fd\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u7ba1\u7406\u60a8\u7684\u6578\u64da\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u4f86\u904b\u884c\u60a8\u7684Redis\u670d\u52d9\u5668\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528Redis\u5be6\u73feLRU\u7b97\u6cd5\uff0c\u8f15\u9b06\u7ba1\u7406\u7de9\u5b58\uff0c\u63d0\u5347\u6027\u80fd\uff0c\u78ba\u4fdd\u6700\u5c11\u4f7f\u7528\u7684\u6578\u64da\u81ea\u52d5\u6dd8\u6c70\uff0c\u512a\u5316\u8cc7\u6e90\u5229\u7528\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-184862","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184862","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=184862"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184862\/revisions"}],"predecessor-version":[{"id":184863,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/184862\/revisions\/184863"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=184862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=184862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=184862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}