{"id":527,"date":"2021-07-28T20:39:42","date_gmt":"2021-07-28T12:39:42","guid":{"rendered":"https:\/\/egonlin.com\/?p=527"},"modified":"2025-06-12T16:52:29","modified_gmt":"2025-06-12T08:52:29","slug":"%e5%b0%8f%e7%bb%93","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=527","title":{"rendered":"\u5c0f\u7ed3"},"content":{"rendered":"<pre>\u6570\u636e\u5e93\u7d22\u5f15\r\n    1\u3001\u7d22\u5f15\u662f\u4ec0\u4e48\uff1f\r\n        \u7d22\u5f15\u4e00\u79cd\u6570\u636e\u6570\u636e\u7ed3\u6784\uff0c\u65e2\u7ed3\u6784\u6570\u636e\uff0c\u5927\u767d\u8bdd\u8bf4\uff1a\u7d22\u5f15\u5c31\u662f\u4e00\u79cd\u7ec4\u7ec7\u6570\u636e\u7684\u65b9\u5f0f\r\n\r\n        \u90a3\u4e48\u7d22\u5f15\u5230\u5e95\u5982\u4f55\u7ec4\u7ec7\u6570\u636e\u7684\u5462\uff1f\r\n\r\n        \u4e3a\u8868\u4e2d\u7684\u4e00\u6761\u6761\u8bb0\u5f55\u521b\u5efa\u5efa\u7acb\u7d22\u5f15\u5c31\u8ddf\u4e3a\u4e66\u7684\u4e00\u9875\u9875\u5185\u5bb9\u521b\u5efa\u76ee\u5f55\u5f88\u7c7b\u4f3c\uff0c\u4f46\u4e0d\u592a\u4e00\u6837\r\n        \u4e0d\u4e00\u6837\u7684\u662f\uff0c\u521b\u5efa\u7d22\u5f15\u5206\u4e3a\u4e24\u6b65\uff1a\r\n            1\u3001\u4ee5\u7d22\u5f15\u5b57\u6bb5\u4e3akey\u4e0e\u6570\u636e\u5bf9\u5e94\uff0c\u4f8b\u5982\r\n\r\n                create index idx_id on t1(id); -- key\u4e3aid\r\n\r\n                \u521b\u5efa\u7d22\u5f15\r\n                         key\r\n                \u8bb0\u5f551  &lt;- 1\r\n                \u8bb0\u5f552  &lt;- 2\r\n                \u8bb0\u5f553  &lt;- 3\r\n                \u8bb0\u5f554  &lt;- 4\r\n                \u8bb0\u5f555  &lt;- 5\r\n                \u3002\u3002\u3002\r\n            2\u3001\u4ee5key\u4e3a\u57fa\u7840\u6784\u5efaB+\u6811\uff0c\u90a3\u4e48\u4ec0\u4e48\u662fB+\u6811\uff1f\uff1f\uff1f\r\n                \u4ecb\u7ecd\u4e0b\u5217\u6811\u7684\u539f\u7406\u7ed3\u6784\u4ee5\u53ca\u7279\u70b9-\u300b\u8bb2\u660e\u767d\u4e0b\u5217\u6811\u662f\u5982\u4f55\u63d0\u901f\u67e5\u8be2\u7684\uff0c\u4ee5\u53ca\u6bcf\u79cd\u6811\u7684\u95ee\u9898\u548c\u6f14\u53d8\u5347\u7ea7\u8fc7\u7a0b\r\n                    \u4e8c\u53c9\u6811\r\n                    \u5e73\u8861\u4e8c\u53c9\u6811\r\n                    B\u6811\r\n                    B+\u6811\r\n\r\n                \u7279\u70b9\u603b\u7ed3\uff1a\r\n                    1\u3001\u8282\u70b9\u5185\u653e\u7684key+value\uff1a\u4e8c\u53c9\u6811\u3001\u5e73\u8861\u4e8c\u53c9\u6811\u3001B\u6811\r\n                        \u5728\u53f6\u5b50\u8282\u70b9\u653evalue\uff0c\u5176\u4f59\u8282\u70b9\u53ea\u653ekey\u503c\uff1aB+\u6811\r\n\r\n                    2\u3001\u653e\u7b49\u91cf\u6570\u636e\u7684\u524d\u63d0\u4e0b\uff0cB+\u6811\u7684\u9ad8\u5ea6\u6700\u4f4e\uff0c\u67e5\u8be2\u901f\u5ea6\u6700\u9ad8\r\n\r\n\r\n    2\u3001\u7d22\u5f15\u5206\u7c7b\u53ca\u533a\u522b\r\n        hash\u7d22\u5f15\r\n        b+\u6811\r\n\r\n\r\n    3\u3001 B+\u6811\u7d22\u5f15\u5206\u7c7b\r\n        \u805a\u7c07\u7d22\u5f15\uff1a\u6784\u5efa\u539f\u7406\uff0c\u53ea\u80fd\u6709\u4e00\u4e2a\r\n            \u5178\u578b\u7279\u70b9\uff1a\u53f6\u5b50\u8282\u70b9\u653ekey\uff1a\u4e00\u6574\u6761\u5b8c\u6574\u8bb0\u5f55\r\n\r\n        \u8f85\u52a9\u7d22\u5f15\uff1a\u6784\u5efa\u539f\u7406\uff0c\u53ef\u4ee5\u6709\u591a\u4e2a\r\n            \u5178\u578b\u7279\u70b9\uff1a\u53f6\u5b50\u8282\u70b9\u653e\u7684\u662fkey:\u8be5\u8bb0\u5f55\u5bf9\u5e94\u7684\u4e3b\u952eid\r\n\r\n\r\n    4\u3001\u8986\u76d6\u7d22\u5f15\u4e0e\u56de\u8868\u64cd\u4f5c\r\n        \u547d\u4e2d\u8f85\u52a9\u7d22\u5f15\u662f\u5426\u4e00\u5b9a\u9700\u8981\u56de\u8868\uff0c\u5982\u679c\u4e0d\uff0c\u89e3\u91ca\u539f\u56e0\r\n\r\n    5\u3001\u8054\u5408\u7d22\u5f15\uff0c\u7d22\u5f15\u7684\u6700\u5de6\u524d\u7f00\u5339\u914d\u539f\u5219-\u300b\u4e3e\u4f8b\u8bf4\u660e\r\n\r\n    6\u3001\u7d22\u5f15\u4e0b\u63a8\u6280\u672f\r\n\r\n\r\n    7\u3001\u4e3e\u4f8b\u8bf4\u660e\uff0c\u547d\u4e2d\u7d22\u5f15\u4e4b\u540e\u662f\u5426\u4e00\u5b9a\u5bf9\u52a0\u901f\u6709\u660e\u663e\u7684\u63d0\u5347------\u300b\u7b49\u540c\u4e8e\u56de\u7b54\u4e86\u5982\u4f55\u6b63\u786e\u4f7f\u7528\u7d22\u5f15!!!\r\n        \u8303\u56f4\u8fc7\u5927\r\n        \u7d22\u5f15\u5b57\u6bb5\u5360\u7528\u7a7a\u95f4\u8fc7\u591a\r\n        \u7d22\u5f15\u5b57\u6bb5\u7684\u533a\u5206\u5ea6\u4f4e\r\n        \u7d22\u5f15\u5b57\u6bb5\u53c2\u4e0e\u8fd0\u7b97\r\n        \u7d22\u5f15\u5b57\u6bb5\u653e\u5165\u51fd\u6570\r\n\r\n        explain\u547d\u4ee4\u7b80\u4ecb\r\n\r\n    8\u3001\u5e38\u8bc6\r\n        \u5355\u8868300w\u6761\u8bb0\u5f55-\u300b\u786c\u76d8\u7a7a\u95f4200m\r\n\r\n        uv\uff1auser view\u5355\u65e5\u7d2f\u8ba1\u7528\u6237\u8bbf\u95ee\r\n                    2-5w\r\n        pv\uff1apage view\u5355\u65e5\u7d2f\u8ba1\u9875\u9762\u88ab\u70b9\u51fb\u7684\u6b21\u6570\r\n                    20w-50w\r\n\r\n        \u6700\u5927\u5e76\u53d1\uff08\u540c\u65f6\u5728\u7ebf\u4eba\u6570\u6700\u5927\u591a\u5c11\uff09\uff1a\u4e00\u5929\u5185\uff0c\u67d0\u4e00\u65f6\u523b\u7684\u5e76\u53d1\u91cf\r\n                1000\u4eba\u540c\u65f6\u5728\u7ebf\r\n\r\n        \u6570\u636e\u5e93\uff08\u8bfb\u591a\u5199\u5c11\uff09\uff1a\r\n            \u7d2f\u8ba12w\u7684UV\uff0c\u5e73\u5747\u6bcf\u4eba\u5f80\u6570\u636e\u5e93\u4e2d\u5199\u5165\u4e00\u6761\u6570\u636e\uff0c\r\n            \u90a3\u4e48\u5355\u65e5\u65b0\u589e\u6570\u636e\u6761\u6570\u4e3a2w\u6761\r\n            2w\u6761\u6570\u636e\u5e93-\u300b\u5360\u7528\u7a7a\u95f4\u5927\u69822M\r\n\r\n            \u7ed3\u8bba\uff1a\u4ee52-5w uv\u4e3a\u4f8b\uff0c\u5355\u65e5\u6570\u636e\u5e93\u7a7a\u95f4\u589e\u957f\u91cf\u4ece\u51e0M\u5230\u51e0\u5341M\u4e0d\u7b49\r\n\r\n    9\u3001MySQL \u5efa\u7acb\u7d22\u5f15\u65f6\uff0c\u5e94\u8be5\u6ce8\u610f\u4ec0\u4e48\uff1f\r\n    \u4e09\u70b9\uff1a \r\n    1. \u5bf9\u533a\u5206\u5ea6\u9ad8\u7684\u5217\u505a\u7d22\u5f15\uff0c \u5bf9\u4e8e\u90a3\u79cd\u53ea\u6709\u4e24\u4e09\u4e2a\u503c\u7684\u505a\u7d22\u5f15\u5e76\u6ca1\u6709\u591a\u5927\u610f\u4e49\u3002 \r\n    2. \u5efa\u7acb\u8054\u5408\u7d22\u5f15\u65f6\u8981\u6ee1\u8db3\u6700\u5de6\u5339\u914d\u539f\u5219\uff0c\u4f8b\u5982\u00a0SELECT * FROM TABLE WHERE A=1 AND B=2 AND C=3, \u6b64\u65f6\u9700\u8981\u5bf9ABC\u5efa\u8054\u5408\u7d22\u5f15\uff0c \u5bf9ABC \u5355\u72ec\u5efa\u4e09\u4e2a\u7d22\u5f15\u662f\u6ca1\u7528\u7684\u3002 \u90a3\u6211\u5bf9BAC\u5efa\u8054\u5408\u7d22\u5f15\u5c31\u547d\u4e2d\u4e0d\u4e86\u7d22\u5f15\u4e86\u5417\uff1f\u4e5f\u662f\u53ef\u4ee5\u547d\u4e2d\u7684\uff0c\u5176\u5b9eMySQL\u5728\u5f88\u4e45\u4ee5\u524d\u5c31\u5728\u67e5\u8be2\u4f18\u5316\u5668\u91cc\u52a0\u5165\u4e86\u8fd9\u4e2afeature\uff0c\u786e\u5b9e\u662f\u53ef\u4ee5\u547d\u4e2d\u7684\u3002 3. \u53ea\u5bf9\u9700\u8981\u4f5c\u4e3a\u67e5\u8be2\u6761\u4ef6\u7684\u5217\u5efa\u7d22\u5f15\uff0c\u5426\u5219\u4f1a\u62d6\u6162\u63d2\u5165\u901f\u5ea6\u3002<\/pre>\n<pre>\u6570\u636e\u5e93\u4e8b\u52a1\r\n    \u4e3e\u4f8b\u8bf4\u660e\u4e8b\u52a1\u7279\u6027ACID\r\n    \u4e8b\u52a1\u5f00\u542f\u7684\u4e09\u79cd\u65b9\u5f0f\r\n    \u4e8b\u52a1\u53ef\u4ee5\u8bbe\u7f6e\u4fdd\u5b58\u70b9\r\n\r\n\u6570\u636e\u5e93\u8bfb\u73b0\u8c61\r\n    \u810f\u8bfb\r\n    \u4e0d\u53ef\u91cd\u590d\r\n    \u5e7b\u8bfb\r\n\r\n\u6570\u636e\u5e93\u9501\r\n    \u7c92\u5ea6\uff1a\u884c\u7ea7 &lt; \u9875\u7ea7 &lt; \u8868\u7ea7  # innodb\u6570\u636e\u5b58\u50a8\u7ed3\u6784\u89c1\uff1ahttps:\/\/egonlin.com\/?p=492\r\n           \u7ea7\u522b\u8d8a\u9ad8\u5e76\u53d1\u8d8a\u4f4e\uff0c\u8003\u8651\u5230\u6027\u80fd\uff0cinnodb\u9ed8\u8ba4\u652f\u6301\u884c\u7ea7\u9501\uff0c\u4f46\u662f\u53ea\u6709\u5728\u547d\u4e2d\u7d22\u5f15\u7684\u60c5\u51b5\u4e0b\u624d\u9501\u884c\uff0c\u5426\u5219\u9501\u4f4f\u6240\u6709\u884c\uff0c\u672c\u8d28\u8fd8\u662f\u884c\u9501\uff0c\r\n           \u4f46\u662f\u6b64\u523b\u76f8\u5f53\u4e8e\u9501\u8868\u4e86\r\n\r\n         \u884c\u7ea7\u9501\u6709\u4e09\u79cd\u7b97\u6cd5\uff1a\r\n            Record lock\r\n            Gap lock\r\n            Next-key lock\uff08\u9ed8\u8ba4\uff09= Record lock+ Gap lock    ------\u300b \u89e3\u51b3\u5e7b\u8bfb\u95ee\u9898\r\n\r\n\r\n\r\n    \u7ea7\u522b\uff1a\u6392\u4ed6\u3001\u5171\u4eab\r\n        \u6392\u4ed6\r\n        \u5171\u4eab\r\n\r\n    \u4f7f\u7528\u65b9\u5f0f\uff1a\u60b2\u89c2\u3001\u4e50\u89c2\r\n\r\n\r\n\r\n\u4e8b\u52a1\u9694\u79bb\u673a\u5236\r\n    \u89e3\u51b3\uff1a\r\n        \u810f\u8bfb\r\n        \u4e0d\u53ef\u91cd\u590d\r\n        \u5e7b\u8bfb\r\n    \u65b9\u6848\uff1a\r\n        RR\u673a\u5236+innodb\u5b58\u50a8\u5f15\u64ce\u7684Next-key lock\u884c\u7ea7\u9501\u7b97\u6cd5\r\n\r\n\r\nMVCC\uff1a\u89e3\u91ca\u539f\u7406\r\n    \u5feb\u7167\u8bfb\r\n        select \u3002\u3002\u3002\r\n    \u5f53\u524d\u8bfb\r\n        \u5176\u4ed6\u90fd\u662f<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6570\u636e\u5e93\u7d22\u5f15 1\u3001\u7d22\u5f15\u662f\u4ec0\u4e48\uff1f \u7d22\u5f15\u4e00\u79cd\u6570\u636e\u6570\u636e\u7ed3\u6784\uff0c\u65e2\u7ed3\u6784\u6570\u636e\uff0c\u5927\u767d\u8bdd\u8bf4\uff1a\u7d22\u5f15\u5c31\u662f\u4e00\u79cd\u7ec4\u7ec7\u6570\u636e\u7684\u65b9\u5f0f \u90a3\u4e48\u7d22\u5f15 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[90],"tags":[21,19,99,22,100,20],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/527"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=527"}],"version-history":[{"count":4,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/527\/revisions"}],"predecessor-version":[{"id":11550,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/527\/revisions\/11550"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}