{"id":45,"date":"2009-03-27T10:47:22","date_gmt":"2009-03-27T02:47:22","guid":{"rendered":"http:\/\/blog.orczhou.com\/?p=45"},"modified":"2009-07-29T19:35:07","modified_gmt":"2009-07-29T11:35:07","slug":"four-way-pager-display","status":"publish","type":"post","link":"https:\/\/www.orczhou.com\/index.php\/2009\/03\/four-way-pager-display\/","title":{"rendered":"\u5206\u9875\u4f18\u5316\u7684\u56db\u79cd\u65b9\u5f0f"},"content":{"rendered":"<p>\u5f88\u4e45\u4ee5\u524d\u8bfb\u4e86\u4e00\u7bc7\u5173\u4e8e\u5206\u9875\u7684\u6587\u7ae0\uff0c\u540e\u6765\u8d8a\u60f3\u8d8a\u6709\u9053\u7406\uff0c\u6700\u8fd1\u53c8\u91cd\u65b0\u627e\u51fa\u6765\uff0c\u5e76\u505a\u4e86\u7ffb\u8bd1\uff0c\u539f\u6587\u53c2\u8003:<a rel=\"bookmark\" href=\"http:\/\/www.mysqlperformanceblog.com\/2008\/09\/24\/four-ways-to-optimize-paginated-displays\/\">Four ways to optimize paginated displays<\/a>.<\/p>\n<p><span class=\"partstart\">\u7ffb\u8bd1\u80cc\u666f\uff1a<\/span>\u5728\u5927\u6570\u636e\u91cf\u7684\u60c5\u51b5\u4e0b\uff0c\u539f\u672c\u5f88\u7b80\u5355\u7684\u5206\u9875\u5982\u679c\u6ca1\u6709\u5904\u7406\u597d\uff0c\u4f60\u4f1a\u53d1\u73b0\u5206\u9875\u7684\u8bf7\u6c42\u4f1a\u6d88\u8017\u4f60\u5927\u91cf\u7684\u6570\u636e\u5e93\u65f6\u95f4\u3002\u5982\u679c\u4f60\u9047\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\uff0c\u6587\u7ae0\u7ed9\u4e86\u4f60\u51e0\u4e2a\u5f88\u597d\u7684\u89e3\u51b3\u7684\u65b9\u6848\u3002\u5f53\u7136\uff0c\u521d\u5b66\u8005\u82e5\u80fd\u770b\u5b8c\u8fd9\u7bc7\u6587\u7ae0\uff0c\u90a3\u4e48\u5b83\u4f1a\u6307\u5bfc\u4f60\u5199\u51fa\u66f4\u5177\u6709\u6269\u5c55\u6027\u7684\u5206\u9875\u4ee3\u7801\u3002<\/p>\n<p><span class=\"partstart\">\u5168\u6587\u6982\u8ff0\uff1a<\/span>\u6587\u4e2d\u63d0\u5230\u4e86\u5206\u9875\u7684\u529e\u6cd5\u603b\u7ed3\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li> \u5168\u90e8\u7f13\u5b58\u67e5\u8be2\u7ed3\u679c\u3002\u628a\u67e5\u8be2\u7ed3\u679c\u5168\u90e8\u7f13\u5b58\u8d77\u6765(\u4f8b\u5982\u6587\u4ef6\u7f13\u5b58\u3001\u9759\u6001\u5316\u7ed3\u679c\u9875\u9762\u7b49)\u3002<\/li>\n<li>\u4e0d\u8be6\u7ec6\u663e\u793a\u603b\u5171\u6709\u591a\u5c11\u5206\u9875\u3002\u8fd9\u91cc\u6709\u4e24\u4e2a\u4f18\u5316\u7684\u6280\u5de7\u3002\u5176\u4e00\u6bcf\u6b21\u5728\u8ba1\u7b97\u603b\u6761\u76ee\u7684\u65f6\u5019\uff0c\u6211\u5c31\u56fa\u5b9a\u67e5\u8be2501\u6761\uff0c\u7136\u540e\u5c06\u524d500\u6761\u5206\u9875\u663e\u793a\u597d\uff0c\u5982\u679c\u7b2c501\u6761\u786e\u5b9e\u5b58\u5728\uff0c\u90a3\u4e48\u7ed9\u51fa\u6309\u94ae \u201c\u67e5\u770b\u66f4\u591a&#8230;\u201d\uff08\u8fd9\u79cd\u60c5\u51b5\u4f1a\u5f88\u5c11\uff09\u3002\u5176\u4e8c\uff0c\u5728\u6bcf\u6b21\u5217\u8868\u672c\u9875\u9762\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u7b2c\u4e00\u9875\u6211\u8981\u663e\u793a1-20\u6761\uff0c\u90a3\u4e48\u6211\u67e5\u8be2\u51fa1-21\u6761\u3002\u5982\u679c\u7b2c21\u6761\u771f\u7684\u5b58\u5728\uff0c\u6211\u5c31\u7ed9\u51fa&#8221;\u4e0b\u4e00\u9875&#8221;\u6309\u94ae\uff0c\u4f9d\u6b21\u7c7b\u63a8\u3002<br \/>\n<!--more--><br \/>\n\u4e8b\u5b9e\u4e0agoogle\u5c31\u662f\u8fd9\u6837\u505a\u7684\u3002\u5728\u67e5\u770b\u7b2c\u4e00\u9875\u641c\u7d22\u7ed3\u679c\u7684\u65f6\u5019google\u53ea\u4f1a\u663e\u793a\u524d\u5341\u9875(\u5171100\u4e2a\u6761\u76ee)\uff0c\u5e76\u4e0d\u663e\u793a\u641c\u7d22\u7ed3\u679c\u6761\u76ee\u603b\u5171\u6709\u591a\u5c11:<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-53\" title=\"\u9996\u9875\u7684\u5206\u9875\u663e\u793a\" src=\"http:\/\/blog.orczhou.com\/wp-content\/uploads\/2009\/03\/1.jpg\" alt=\"\u9996\u9875\u7684\u5206\u9875\u663e\u793a\" width=\"282\" height=\"72\" \/><br \/>\n\u67e5\u770b\u7b2c\u4e8c\u9875\u7684\u65f6\u5019\uff0c\u4ec5\u4ec5\u4f1a\u591a\u663e\u793a\u4e00\u9875<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-54\" title=\"\u7b2c\u4e8c\u9875\u7684\u5206\u9875\u663e\u793a\" src=\"http:\/\/blog.orczhou.com\/wp-content\/uploads\/2009\/03\/2.jpg\" alt=\"\u7b2c\u4e8c\u9875\u7684\u5206\u9875\u663e\u793a\" width=\"340\" height=\"73\" srcset=\"https:\/\/www.orczhou.com\/wp-content\/uploads\/2009\/03\/2.jpg 340w, https:\/\/www.orczhou.com\/wp-content\/uploads\/2009\/03\/2-300x64.jpg 300w\" sizes=\"auto, (max-width: 340px) 100vw, 340px\" \/><\/li>\n<li>\u901a\u8fc7EXPLAIN\u7684&#8221;row&#8221;\u5217\u6765\u4f30\u7b97\u7ed3\u679c\u603b\u5171\u6709\u591a\u5c11\u6761\u76ee\u3002\u6587\u7ae0\u4e2d\u79f0google\u662f\u8fd9\u6837\u4f30\u7b97\u7ed3\u679c\u96c6\u7684\uff1a<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-55\" title=\"google\u603b\u7ed3\u679c\u96c6\" src=\"http:\/\/blog.orczhou.com\/wp-content\/uploads\/2009\/03\/3.jpg\" alt=\"google\u603b\u7ed3\u679c\u96c6\" width=\"312\" height=\"95\" srcset=\"https:\/\/www.orczhou.com\/wp-content\/uploads\/2009\/03\/3.jpg 312w, https:\/\/www.orczhou.com\/wp-content\/uploads\/2009\/03\/3-300x91.jpg 300w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><\/li>\n<\/ol>\n<hr \/>\n<p><span class=\"partstart\">\u5168\u6587\u8bd1\u6587\uff1a<\/span><\/p>\n<p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5206\u9875\u663e\u793a\u662f\u6211\u4eec\u6700\u5e38\u9047\u5230\u7684\u4f18\u5316\u95ee\u9898\u4e4b\u4e00\u3002\u4f8b\u5982\u641c\u7d22\u7ed3\u679c\u3001\u79ef\u5206\u5217\u8868\u3001\u6392\u884c\u699c\u7b49\u3002\u5206\u9875\u7684\u4e00\u822c\u6a21\u578b:\u5728\u4e00\u4e2a\u6392\u5e8f\u7684\u7ed3\u679c\u96c6\u5408(\u8f83\u5927)\u4e2d\u6211\u4eec\u8981\u663e\u793a\u5176\u4e2d\u8fde\u7eed20\u6761\u76ee;\u5e76\u4e14\u9700\u8981\u663e\u793a \u201c\u4e0b\u4e00\u9875\u201d\u3001\u201d\u4e0a\u4e00\u9875\u201d\u7684\u94fe\u63a5;\u6709\u65f6\u5019\u6211\u4eec\u8fd8\u9700\u8981\u663e\u793a\uff0c\u603b\u5171\u6709\u591a\u5c11\u4e2a\u6761\u76ee\uff0c\u4e00\u5171\u5206\u4e86\u591a\u5c11\u9875\u3002<\/p>\n<p>\u8981\u7ed9\u51fa\u8fd9\u6837\u4e00\u4e2a\u5b8c\u6210\u663e\u793a\uff0c\u6570\u636e\u5e93\u7684\u4ee3\u4ef7\u662f\u5f88\u5927\u7684\uff0c\u6709\u65f6\u5019\u5c31\u4e3a\u4e86\u663e\u793a\u8fd9\u4e48\u4e00\u4e2a\u5206\u9875\uff0c\u9700\u8981\u6267\u884c\u7684SQL\u4f1a\u6bd4\u6574\u4e2a\u9875\u9762\u663e\u793a\u5176\u4ed6\u7684\u5168\u90e8SQL\u6d88\u8017\u8fd8\u8981\u5927\u3002<br \/>\n\u6211\u66fe\u9047\u5230\u8fd9\u6837\u7684\u6848\u4f8b\uff1a\u6709\u4e00\u6b21\u5728\u4e3a\u6211\u4eec\u7684\u4e00\u4e2a\u5ba2\u6237\u505aSlow Query LOG\u5206\u6790\u7684\u65f6\u5019\u6211\u4eec\u5c31\u53d1\u73b0:\u6574\u4e2aLOG \u91cc\u9762\u7684SQL\u8017\u65f66300s,\u5176\u4e2d\u4e24\u4e2a\u4e3b\u8981\u7684\u5206\u9875\u67e5\u8be2\u5927\u7ea6\u6d88\u8017\u4e86(2850 + 380)\u79d2,\u5360\u4e86\u6574\u4e2aSlow Query\u768450%\u3002<br \/>\n\u5206\u9875\u6ca1\u6709\u5904\u7406\u597d\u5c31\u662f\u8fd9\u4e48\u7cdf\u7cd5~.<\/p>\n<p>\u6211\u4eec\u6765\u5206\u6790\u4e00\u4e0b\u5206\u9875\u7684\u4e00\u822c\u60c5\u51b5:<\/p>\n<p>#\u5178\u578b\u5206\u9875\u7684SQL\u5982\u4e0b:<br \/>\nSELECT &#8230;. FROM &#8230; ORDER BY &#8230;. LIMIT X, 20<\/p>\n<p>\u5982\u679cORDER BY\u90e8\u5206\u6ca1\u6709\u80fd\u591f\u7528\u7d22\u5f15\u7684\u8bdd\uff08\u8fd9\u6837\u7684\u60c5\u51b5\u8fd8\u662f\u5f88\u591a\u7684\uff09\uff0cMYSQL\u5c31\u4f1a\u505a\u6587\u4ef6\u6392\u5e8f(filesort)\uff1b\u5047\u60f3\u5982\u679c\u5982\u679c\u6ee1\u8db3WHERE \u6761\u4ef6\u7684\u6761\u76ee\u5171\u6709\u4e2a\u767e\u4e07\u7684\u6570\u91cf\u7ea7\u7684\u8bdd\uff0c\u90a3\u4e48MYSQL\u5c31\u4f1a\u53d6\u51fa\u8fd9\u4e0a\u767e\u4e07\u7684\u7ed3\u679c\uff0c\u4e34\u65f6\u5b58\u50a8\u3001\u6587\u4ef6\u6392\u5e8f\uff0c\u7136\u540e\u518d\u5220\u9664\u5927\u5927\u90e8\u5206\u7684\u6570\u636e\u4fdd\u7559\u5176\u4e2d\u768420\u4e2a\u3002\u5f53\u7528\u6237\u70b9\u51fb\u201c\u4e0b\u4e00\u9875\u201d\u7684\u65f6\u5019\uff0c\u4e0a\u9762\u7684\u8fc7\u7a0b\u4f1a\u5b8c\u5168\u91cd\u505a\u4e00\u904d\uff0c\u53ea\u662f\u53d6\u5f97\u7ed3\u679c\u5411\u540e\u504f\u4e86\u4e00\u70b9\u3002\u8981\u662f\u4f60\u8fd8\u60f3\u663e\u793a\u201c\u603b\u5171\u6709\u591a\u5c11\u6761\u76ee\uff0c\u5171\u5206\u591a\u5c11\u9875\u9762\u201d\u7684\u8bdd\uff0c\u4e00\u822c\u662f\u8fd9\u6837\u505a(1)\u4f7f\u7528SQL_CALC_FOUND_ROWS\u00a0(2)\u6267\u884c\u4e00\u4e2a\u5355\u72ec\u7684SQL\u53bb\u8ba1\u7b97\u884c\u6570\u3002\u5982\u679c\u7528\u6237\u7684\u6bcf\u4e00\u6b21\u8bf7\u6c42\u90fd\u6267\u884c\u4ee5\u4e0a\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u60f3\u8c61\u5f53\u4f60\u7684\u6570\u636e\u91cf\u8d8a\u6765\u8d8a\u5927\u7684\u65f6\u5019\uff0c\u60c5\u51b5\u4f1a\u8d8a\u6765\u8d8a\u7cdf\u3002<\/p>\n<p>\u4e8b\u5b9e\u4e0a\uff0c\u6709\u5f88\u591a\u529e\u6cd5\u53bb\u4f18\u5316\u4e0a\u9762\u7684\u8fc7\u7a0b\u7684\u3002(\u5173\u4e8e\u8fd9\u4e00\u70b9\u6211\u4e4b\u524d\u6211\u5199\u8fc7\u7684\u4e00\u7bc7article on optimizing ranked data \u3002\u4e0d\u8fc7\u90a3\u7bc7\u6587\u7ae0\u91cc\u9762\u4ecb\u7ecd\u7684\u529e\u6cd5\u5b9e\u65bd\u8d77\u6765\u6bd4\u8f83\u56f0\u96be\u3002\u6240\u4ee5\u5982\u679c\u4e0d\u662f\u60c5\u51b5\u590d\u6742\u548c\u91cd\u8981\u5230\u4e00\u5b9a\u7a0b\u5ea6\uff0c\u5c31\u4e0d\u503c\u5f97\u90a3\u6837\u505a\u3002)\u90a3\u4e00\u822c\u60c5\u51b5\u600e\u4e48\u529e\u5462\uff1f\u9664\u4e86\u7d22\u5f15\u3001\u91cd\u7ec4\u6570\u636e\u3001SQL\u4f18\u5316,\u6211\u4eec\u8fd8\u6709\u4e24\u4e2a\u5927\u7684\u65b9\u9762\u53ef\u4ee5\u8003\u8651\u53bb\u505a\u3002\u5176\u4e00\uff0c\u79ef\u6781\u7684\u628aSQL\u7684\u67e5\u8be2\u7ed3\u679c\u7f13\u5b58\u8d77\u6765\uff0c\u4ece\u800c\u51cf\u5c11SQL\u6267\u884c;\u5176\u4e8c\u5c31\u662f\u91cd\u65b0\u8003\u8651\u4e00\u4e0b\u4f60\u7684\u5206\u9875\u5c31\u67b6\u6784\uff0c\u5728\u5e94\u7528\u4e2d\uff0c\u5e76\u4e0d\u662f\u6bcf\u6b21\u90fd\u9700\u8981\u628a\u5206\u9875\u7684\u5404\u4e2a\u90e8\u5206\u90fd\u5b8c\u6574\u663e\u793a\u51fa\u6765\u7684\u3002\u4f8b\u5982\u4f60\u628a\u4ece\u7b2c1\u523050\u9875\u7684\u94fe\u63a5\u90fd\u7ed9\u51fa\u6765\uff0c\u5f88\u591a\u65f6\u5019\u7528\u6237\u6839\u672c\u4e0d\u4f1a\u76f4\u63a5\u53bb\u70b9\u51fb\u67d0\u4e00\u9875\u3002\u6211\u4eec\u8003\u8651\u7684\u601d\u8def\u662f\u6307\u628a\u6700\u91cd\u8981\u7684\u90e8\u5206\u5148\u5c55\u793a\u51fa\u6765\u3002<\/p>\n<p><span> 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