{"id":124735,"date":"2024-10-25T16:43:21","date_gmt":"2024-10-25T08:43:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/124735\/"},"modified":"2024-10-25T16:43:22","modified_gmt":"2024-10-25T08:43:22","slug":"redis-%e8%a8%88%e7%ae%97%e6%95%b8%e6%93%9a%e6%a2%9d%e6%95%b8%e7%9a%84%e7%b0%a1%e5%96%ae%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/124735\/","title":{"rendered":"Redis \u8a08\u7b97\u6578\u64da\u689d\u6578\u7684\u7c21\u55ae\u65b9\u6cd5"},"content":{"rendered":"

Redis \u8a08\u7b97\u6578\u64da\u689d\u6578\u7684\u7c21\u55ae\u65b9\u6cd5<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cRedis \u4f5c\u70ba\u4e00\u7a2e\u9ad8\u6548\u7684\u9375\u503c\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u5834\u666f\uff0c\u5305\u62ec\u7de9\u5b58\u3001\u6d88\u606f\u968a\u5217\u548c\u5be6\u6642\u6578\u64da\u5206\u6790\u3002\u8a08\u7b97 Redis \u4e2d\u6578\u64da\u689d\u6578\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u76e3\u63a7\u548c\u5206\u6790\u6578\u64da\u6642\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u7c21\u55ae\u7684\u65b9\u6cd5\u4f86\u8a08\u7b97 Redis \u4e2d\u7684\u6578\u64da\u689d\u6578\u3002<\/p>\n

\u4f7f\u7528 Redis \u7684 DBSIZE<\/code> \u547d\u4ee4<\/h2>\n

Redis \u63d0\u4f9b\u4e86\u4e00\u500b\u7c21\u55ae\u7684\u547d\u4ee4 DBSIZE<\/code>\uff0c\u53ef\u4ee5\u7528\u4f86\u8a08\u7b97\u7576\u524d\u6578\u64da\u5eab\u4e2d\u9375\u7684\u6578\u91cf\u3002\u9019\u500b\u547d\u4ee4\u975e\u5e38\u76f4\u63a5\uff0c\u9069\u5408\u7528\u65bc\u5feb\u901f\u7372\u53d6\u6578\u64da\u689d\u6578\u3002<\/p>\n

127.0.0.1:6379> DBSIZE\n(integer) 42\n<\/code><\/pre>\n
\u4e0a\u8ff0\u547d\u4ee4\u8fd4\u56de\u7684\u6574\u6578\u5373\u70ba\u7576\u524d\u6578\u64da\u5eab\u4e2d\u7684\u9375\u6578\u91cf\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u9019\u500b\u547d\u4ee4\u53ea\u8a08\u7b97\u7576\u524d\u9078\u5b9a\u6578\u64da\u5eab\u7684\u9375\u6578\u91cf\uff0c\u82e5\u4f7f\u7528\u591a\u500b\u6578\u64da\u5eab\uff0c\u9700\u5207\u63db\u5230\u76f8\u61c9\u7684\u6578\u64da\u5eab\u5f8c\u518d\u57f7\u884c\u3002<\/p>\n
\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u904d\u6b77\u9375<\/h2>\n
\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u904d\u6b77\u9375\u3002\u9019\u500b\u547d\u4ee4\u4e0d\u6703\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u9375\uff0c\u800c\u662f\u5206\u6279\u8fd4\u56de\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u5167\u5b58\u7684\u4f7f\u7528\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 SCAN<\/code> \u547d\u4ee4\u8a08\u7b97\u9375\u6578\u91cf\u7684\u793a\u4f8b\uff1a<\/p>\n
let count = 0;\nlet cursor = '0';\n\ndo {\n    const result = await redis.scan(cursor);\n    cursor = result[0];\n    count += result[1].length;\n} while (cursor !== '0');\n\nconsole.log(`Total keys: ${count}`);\n<\/code><\/pre>\n
\u5728\u9019\u6bb5\u4ee3\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528\u4e86\u4e00\u500b\u5faa\u74b0\u4f86\u904d\u6b77\u6240\u6709\u9375\uff0c\u4e26\u7d2f\u52a0\u6bcf\u6b21\u8fd4\u56de\u7684\u9375\u6578\u91cf\uff0c\u76f4\u5230\u6e38\u6a19\u8fd4\u56de\u5230\u521d\u59cb\u503c ‘0’\u3002<\/p>\n
\u4f7f\u7528 KEYS<\/code> \u547d\u4ee4<\/h2>\n
\u96d6\u7136 KEYS<\/code> \u547d\u4ee4\u53ef\u4ee5\u7528\u4f86\u7372\u53d6\u6240\u6709\u9375\uff0c\u4f46\u4e0d\u5efa\u8b70\u5728\u751f\u7522\u74b0\u5883\u4e2d\u4f7f\u7528\uff0c\u56e0\u70ba\u5b83\u6703\u963b\u585e Redis \u4f3a\u670d\u5668\uff0c\u7279\u5225\u662f\u5728\u9375\u6578\u91cf\u9f90\u5927\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n
\u5982\u679c\u78ba\u5be6\u9700\u8981\u4f7f\u7528 KEYS<\/code> \u547d\u4ee4\uff0c\u53ef\u4ee5\u9019\u6a23\u505a\uff1a<\/p>\n
const keys = await redis.keys('*');\nconsole.log(`Total keys: ${keys.length}`);\n<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u5c07\u8fd4\u56de\u6240\u6709\u9375\u4e26\u8a08\u7b97\u5176\u6578\u91cf\uff0c\u4f46\u8acb\u8b39\u614e\u4f7f\u7528\uff0c\u56e0\u70ba\u5b83\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n
\u4f7f\u7528 Redis \u7684\u6578\u64da\u7d50\u69cb<\/h2>\n
\u5982\u679c\u4f60\u7684\u61c9\u7528\u5834\u666f\u4e2d\u4f7f\u7528\u4e86 Redis \u7684\u6578\u64da\u7d50\u69cb\uff0c\u5982\u96c6\u5408\uff08Set\uff09\u6216\u6709\u5e8f\u96c6\u5408\uff08Sorted Set\uff09\uff0c\u53ef\u4ee5\u5229\u7528\u9019\u4e9b\u7d50\u69cb\u7684\u5167\u5efa\u547d\u4ee4\u4f86\u8a08\u7b97\u5143\u7d20\u6578\u91cf\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u96c6\u5408\uff0c\u53ef\u4ee5\u4f7f\u7528 SCARD<\/code> \u547d\u4ee4\uff1a<\/p>\n
127.0.0.1:6379> SCARD myset\n(integer) 10\n<\/code><\/pre>\n
\u9019\u6a23\u53ef\u4ee5\u76f4\u63a5\u7372\u53d6\u96c6\u5408\u4e2d\u5143\u7d20\u7684\u6578\u91cf\uff0c\u9019\u5c0d\u65bc\u7279\u5b9a\u7684\u6578\u64da\u7d50\u69cb\u4f86\u8aaa\u662f\u975e\u5e38\u9ad8\u6548\u7684\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u8a08\u7b97 Redis \u4e2d\u7684\u6578\u64da\u689d\u6578\u6709\u591a\u7a2e\u65b9\u6cd5\uff0c\u5305\u62ec\u4f7f\u7528 DBSIZE<\/code>\u3001SCAN<\/code>\u3001KEYS<\/code> \u547d\u4ee4\u4ee5\u53ca\u91dd\u5c0d\u7279\u5b9a\u6578\u64da\u7d50\u69cb\u7684\u547d\u4ee4\u3002\u6839\u64da\u5177\u9ad4\u7684\u61c9\u7528\u9700\u6c42\u548c\u6578\u64da\u91cf\u5927\u5c0f\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u6027\u80fd\u548c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u81f3\u95dc\u91cd\u8981\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd Redis \u7684\u904b\u884c\u74b0\u5883\u7a69\u5b9a\u53ef\u9760\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22 Redis \u4e2d\u8a08\u7b97\u6578\u64da\u689d\u6578\u7684\u7c21\u55ae\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u5feb\u901f\u7372\u53d6\u6e96\u78ba\u7d71\u8a08\u4fe1\u606f\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-124735","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124735","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=124735"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124735\/revisions"}],"predecessor-version":[{"id":124736,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/124735\/revisions\/124736"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=124735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=124735"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=124735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}