{"id":32826,"date":"2023-05-31T16:49:15","date_gmt":"2023-05-31T08:49:15","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=32826"},"modified":"2023-07-31T00:20:47","modified_gmt":"2023-07-30T16:20:47","slug":"mysql-innodb%e8%81%9a%e7%b0%87%e7%b4%a2%e5%bc%95b%e6%a0%91%e7%9a%84%e9%98%b6m%e6%98%af%e6%80%8e%e6%a0%b7%e5%86%b3%e5%ae%9a%e7%9a%84","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/32826.html","title":{"rendered":"MySQL InnoDB\u805a\u7c07\u7d22\u5f15B+\u6811\u7684\u9636(m)\u662f\u600e\u6837\u51b3\u5b9a\u7684"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>MySQL InnoDB\u805a\u7c07\u7d22\u5f15B+\u6811\u7684\u9636(m)\u662f\u7531\u4ee5\u4e0b\u65b9\u5f0f\u51b3\u5b9a\u7684\uff1a1\u3001\u9875\u7684\u5927\u5c0f\uff1b2\u3001\u5173\u952e\u5b57\u5927\u5c0f\u3002B+\u6811\u662f\u4ee5\u56fa\u5b9a\u5927\u5c0f\u7684\u9875\u4e3a\u5355\u4f4d\u8fdb\u884c\u5b58\u50a8\u548c\u64cd\u4f5c\u7684\uff0c\u5173\u952e\u5b57\u7684\u5927\u5c0f\u4f1a\u5f71\u54cd\u6bcf\u4e2a\u8282\u70b9\u80fd\u591f\u5b58\u50a8\u7684\u5173\u952e\u5b57\u6570\u91cf\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-32829\" decoding=\"async\" height=\"421\" sizes=\"(max-width: 680px) 100vw, 680px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u95ee\u7b54\u6a21\u677f680-\u00d7-421-\u50cf\u7d20-2023-05-31T164855.696.jpg?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u95ee\u7b54\u6a21\u677f680-\u00d7-421-\u50cf\u7d20-2023-05-31T164855.696.jpg?x-oss-process=image\/auto-orient,1\/format,webp 680w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/05\/\u95ee\u7b54\u6a21\u677f680-\u00d7-421-\u50cf\u7d20-2023-05-31T164855.696-300x186.jpg 300w\" width=\"680\"\/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\">\u4e00\u3001MySQL InnoDB\u805a\u7c07\u7d22\u5f15B+\u6811\u7684\u9636(m)\u662f\u600e\u6837\u51b3\u5b9a\u7684<\/h2>\n<h3 class=\"wp-block-heading\">1\u3001\u9875\u7684\u5927\u5c0f\uff08Page Size\uff09<\/h3>\n<p>B+\u6811\u662f\u4ee5\u56fa\u5b9a\u5927\u5c0f\u7684\u9875\uff08Page\uff09\u4e3a\u5355\u4f4d\u8fdb\u884c\u5b58\u50a8\u548c\u64cd\u4f5c\u7684\uff0c\u9875\u662f\u6570\u636e\u5e93\u78c1\u76d8\u5b58\u50a8\u7684\u6700\u5c0f\u5355\u4f4d\u3002InnoDB\u4f7f\u7528\u7684\u9ed8\u8ba4\u9875\u5927\u5c0f\u662f16KB\uff0c\u4f46\u4e5f\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n<h3 class=\"wp-block-heading\">2\u3001\u5173\u952e\u5b57\u5927\u5c0f\uff08Key Size\uff09<\/h3>\n<p>B+\u6811\u7684\u6bcf\u4e2a\u8282\u70b9\u5b58\u50a8\u5173\u952e\u5b57\u53ca\u5176\u5bf9\u5e94\u7684\u6307\u9488\uff0c\u5173\u952e\u5b57\u7684\u5927\u5c0f\u4f1a\u5f71\u54cd\u6bcf\u4e2a\u8282\u70b9\u80fd\u591f\u5b58\u50a8\u7684\u5173\u952e\u5b57\u6570\u91cf\u3002InnoDB\u7684\u805a\u7c07\u7d22\u5f15\u4f7f\u7528\u7684\u662f\u4e3b\u952e\u4f5c\u4e3a\u7d22\u5f15\uff0c\u4e3b\u952e\u7684\u5927\u5c0f\u53d6\u51b3\u4e8e\u5b9a\u4e49\u7684\u6570\u636e\u7c7b\u578b\u548c\u957f\u5ea6\u3002<\/p>\n<p>\u6839\u636e\u8fd9\u4e24\u4e2a\u56e0\u7d20\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97B+\u6811\u7684\u9636m\uff1a<\/p>\n<p>m = (\u9875\u5927\u5c0f \u2013 \u6811\u8282\u70b9\u5934\u90e8\u5927\u5c0f) \/ (\u5173\u952e\u5b57\u5927\u5c0f + \u6307\u9488\u5927\u5c0f)<\/p>\n<p>\u5176\u4e2d\uff0c\u6811\u8282\u70b9\u5934\u90e8\u5927\u5c0f\u5305\u62ec\u8282\u70b9\u5143\u6570\u636e\u548c\u6307\u9488\u7684\u5927\u5c0f\uff0c\u6307\u9488\u5927\u5c0f\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u548c\u786c\u4ef6\u5e73\u53f0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"MySQL InnoDB\u805a\u7c07\u7d22\u5f15B+\u6811\u7684\u9636(m)\u662f\u7531\u4ee5\u4e0b\u65b9\u5f0f\u51b3\u5b9a\u7684\uff1a1\u3001\u9875\u7684\u5927\u5c0f\uff1b2\u3001\u5173\u952e\u5b57\u5927\u5c0f\u3002B+\u6811\u662f\u4ee5\u56fa [&hellip;]","protected":false},"author":1,"featured_media":32830,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[385],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/32826"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=32826"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/32826\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/32830"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=32826"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=32826"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=32826"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}