{"id":185982,"date":"2024-11-11T02:07:22","date_gmt":"2024-11-10T18:07:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185982\/"},"modified":"2024-11-11T02:07:24","modified_gmt":"2024-11-10T18:07:24","slug":"%e6%95%b8%e6%93%9a%e5%ba%abmod2%ef%bc%9a%e5%84%aa%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e7%9a%84%e5%88%a9%e5%99%a8%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%abmod2%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185982\/","title":{"rendered":"\u6578\u64da\u5eabMod2\uff1a\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u7684\u5229\u5668\uff08\u6578\u64da\u5eabmod2=\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%abmod2%ef%bc%9a%e5%84%aa%e5%8c%96%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e7%9a%84%e5%88%a9%e5%99%a8-UeSuBGgsQb\">\u6578\u64da\u5eabMod2\uff1a\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u7684\u5229\u5668<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u4f01\u696d\u7684\u6210\u529f\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u6210\u70ba\u4e86\u8a31\u591a\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u9762\u81e8\u7684\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eabMod2\u7684\u6982\u5ff5\u53ca\u5176\u5728\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%abmod2%ef%bc%9f-UeSuBGgsQb\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eabMod2\uff1f<\/h2>\n<p>\u6578\u64da\u5eabMod2\u662f\u4e00\u7a2e\u91dd\u5c0d\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u6280\u8853\uff0c\u65e8\u5728\u901a\u904e\u8abf\u6574\u6578\u64da\u5eab\u7684\u7d50\u69cb\u548c\u67e5\u8a62\u65b9\u5f0f\u4f86\u63d0\u9ad8\u5176\u6548\u7387\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u6d89\u53ca\u5230\u6578\u64da\u5eab\u7684\u7d22\u5f15\u3001\u67e5\u8a62\u512a\u5316\u3001\u7de9\u5b58\u7b56\u7565\u7b49\u65b9\u9762\u7684\u8abf\u6574\u3002Mod2\u7684\u6838\u5fc3\u7406\u5ff5\u662f\u901a\u904e\u7cbe\u7d30\u5316\u7684\u7ba1\u7406\u548c\u8abf\u6574\uff0c\u4f86\u9054\u5230\u6700\u4f73\u7684\u6027\u80fd\u8868\u73fe\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e7%9a%84%e9%97%9c%e9%8d%b5%e5%9b%a0%e7%b4%a0-UeSuBGgsQb\">\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u95dc\u9375\u56e0\u7d20<\/h2>\n<p>\u5728\u9032\u884c\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u6642\uff0c\u6709\u5e7e\u500b\u95dc\u9375\u56e0\u7d20\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u7d22\u5f15\u7684\u4f7f\u7528\uff1a<\/strong>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u7684\u91cd\u8981\u5de5\u5177\u3002\u5408\u7406\u7684\u7d22\u5f15\u8a2d\u8a08\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6642\u9593\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5b57\u6bb5\uff0c\u61c9\u8a72\u5efa\u7acb\u7d22\u5f15\u4ee5\u52a0\u5feb\u6aa2\u7d22\u901f\u5ea6\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u512a\u5316SQL\u67e5\u8a62\u8a9e\u53e5\u662f\u63d0\u5347\u6027\u80fd\u7684\u53e6\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u4f7f\u7528EXPLAIN\u547d\u4ee4\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u9032\u884c\u91dd\u5c0d\u6027\u7684\u512a\u5316\u3002<\/li>\n<li><strong>\u7de9\u5b58\u7b56\u7565\uff1a<\/strong>\u7de9\u5b58\u53ef\u4ee5\u6e1b\u5c11\u5c0d\u6578\u64da\u5eab\u7684\u76f4\u63a5\u8a2a\u554f\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u3002\u4f7f\u7528Redis\u6216Memcached\u7b49\u7de9\u5b58\u6280\u8853\uff0c\u53ef\u4ee5\u5c07\u983b\u7e41\u8a2a\u554f\u7684\u6578\u64da\u5b58\u5132\u5728\u5167\u5b58\u4e2d\uff0c\u5feb\u901f\u97ff\u61c9\u7528\u6236\u8acb\u6c42\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u8a2d\u8a08\uff1a<\/strong>\u826f\u597d\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u53ef\u4ee5\u907f\u514d\u5197\u9918\u6578\u64da\u548c\u4e0d\u5fc5\u8981\u7684\u8907\u96dc\u6027\u3002\u4f7f\u7528\u6b63\u898f\u5316\u6280\u8853\u53ef\u4ee5\u5e6b\u52a9\u6e1b\u5c11\u6578\u64da\u91cd\u8907\uff0c\u63d0\u9ad8\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90-UeSuBGgsQb\">\u5be6\u969b\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u4ee5\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u70ba\u4f8b\uff0c\u8a72\u7db2\u7ad9\u7684\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u4e86\u5927\u91cf\u7684\u7522\u54c1\u4fe1\u606f\u548c\u7528\u6236\u6578\u64da\u3002\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\uff0c\u7db2\u7ad9\u7684\u67e5\u8a62\u901f\u5ea6\u958b\u59cb\u4e0b\u964d\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u4e00\u554f\u984c\uff0c\u958b\u767c\u5718\u968a\u6c7a\u5b9a\u5be6\u65bd\u6578\u64da\u5eabMod2\u7684\u512a\u5316\u7b56\u7565\uff1a<\/p>\n<pre><code>-- \u5275\u5efa\u7d22\u5f15\nCREATE INDEX idx_product_name ON products(name);\n\n-- \u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62\nEXPLAIN SELECT * FROM products WHERE name = 'example_product';\n<\/code><\/pre>\n<p>\u901a\u904e\u9019\u4e9b\u63aa\u65bd\uff0c\u7db2\u7ad9\u7684\u67e5\u8a62\u901f\u5ea6\u986f\u8457\u63d0\u9ad8\uff0c\u6700\u7d42\u7528\u6236\u9ad4\u9a57\u5f97\u5230\u4e86\u6539\u5584\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-UeSuBGgsQb\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eabMod2\u662f\u4e00\u7a2e\u6709\u6548\u7684\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u5de5\u5177\uff0c\u901a\u904e\u5408\u7406\u7684\u7d22\u5f15\u3001\u67e5\u8a62\u512a\u5316\u3001\u7de9\u5b58\u7b56\u7565\u548c\u826f\u597d\u7684\u6578\u64da\u5eab\u8a2d\u8a08\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002\u5728\u7576\u4eca\u7af6\u722d\u6fc0\u70c8\u7684\u5e02\u5834\u74b0\u5883\u4e2d\uff0c\u4f01\u696d\u5fc5\u9808\u91cd\u8996\u6578\u64da\u5eab\u7684\u6027\u80fd\u512a\u5316\uff0c\u4ee5\u78ba\u4fdd\u5176\u696d\u52d9\u904b\u71df\u7684\u9ad8\u6548\u6027\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u8cc7\u8a0a\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eabMod2\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u5de5\u5177\uff0c\u52a9\u60a8\u512a\u5316\u67e5\u8a62\u901f\u5ea6\u8207\u8cc7\u6e90\u7ba1\u7406\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u8655\u7406\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-185982","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185982","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=185982"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185982\/revisions"}],"predecessor-version":[{"id":185983,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185982\/revisions\/185983"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185982"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185982"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185982"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}