{"id":10006030,"date":"2022-07-27T23:16:50","date_gmt":"2022-07-27T15:16:50","guid":{"rendered":"https:\/\/ityet.com\/?p=10006030"},"modified":"2022-07-27T23:16:50","modified_gmt":"2022-07-27T15:16:50","slug":"mysql-%e6%9c%80%e5%a4%a7%e5%bb%ba%e8%ae%ae%e8%a1%8c%e6%95%b02000w%e9%9d%a0%e8%b0%b1%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006030","title":{"rendered":"mysql \u6700\u5927\u5efa\u8bae\u884c\u65702000w,\u9760\u8c31\u5417\uff1f"},"content":{"rendered":"<p>1 \u80cc\u666f<\/p>\n<p>\u4f5c\u4e3a\u5728\u540e\u7aef\u5708\u5f00\u8f66\u7684\u591a\u5e74\u8001\u53f8\u673a\uff0c\u662f\u4e0d\u662f\u7ecf\u5e38\u542c\u5230\u8fc7\uff0c\u201cmysql \u5355\u8868\u6700\u597d\u4e0d\u8981\u8d85\u8fc72000w\u201d,\u201c\u5355\u8868\u8d85\u8fc72000w \u5c31\u8981\u8003\u8651\u6570\u636e\u8fc1\u79fb\u4e86\u201d\uff0c\u201c\u4f60\u8fd9\u4e2a\u8868\u6570\u636e\u90fd\u9a6c\u4e0a\u8981\u52302000w 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loading=\"lazy\"><\/p>\n<p>\u5229\u7528mysql\u4f2a\u5217rownum \u8bbe\u7f6e\u4f2a\u5217\u8d77\u59cb\u70b9\u4e3a1<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc1mCq\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u8fd0\u884c\u4e0b\u9762\u7684sql\uff0c\u8fde\u7eed\u6267\u884c20\u6b21\uff0c\u5c31\u662f2\u768420\u6b21\u65b9\u7ea6\u7b49\u4e8e100w \u7684\u6570\u636e\uff1b\u6267\u884c23\u6b21\u5c31\u662f2\u768423\u6b21\u65b9\u7ea6\u7b49\u4e8e800w ,\u5982\u6b64\u4e0b\u53bb\u5373\u53ef\u5b9e\u73b0\u5343\u4e07\u6d4b\u8bd5\u6570\u636e\u7684\u63d2\u5165\uff0c\u5982\u679c\u4e0d\u60f3\u7ffb\u500d\u7ffb\u500d\u7684\u589e\u52a0\u6570\u636e\uff0c\u800c\u662f\u60f3\u5c11\u91cf\uff0c\u5c11\u91cf\u7684\u589e\u52a0\uff0c\u6709\u4e2a\u6280\u5de7\uff0c\u5c31\u662f\u5728SQL \u7684\u540e\u9762\u589e\u52a0where \u6761\u4ef6\uff0c\u5982id&gt;\u67d0\u4e00\u4e2a\u503c\u53bb\u63a7\u5236\u589e\u52a0\u7684\u6570\u636e\u91cf\u5373\u53ef\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc1mCr\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u6b64\u5904\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u4e5f\u8bb8\u4f60\u5728\u6267\u884c\u5230\u8fd1800w \u6216\u80051000w \u6570\u636e\u7684\u65f6\u5019\uff0c\u4f1a\u62a5\u9519\uff1aThe total number of locks exceeds the lock table size\uff0c\u8fd9\u662f\u7531\u4e8e\u4f60\u7684\u4e34\u65f6\u8868\u5185\u5b58\u8bbe\u7f6e\u7684\u4e0d\u591f\u5927\uff0c\u53ea\u9700\u8981\u6269\u5927\u4e00\u4e0b\u8bbe\u7f6e\u53c2\u6570\u5373\u53ef\u3002<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc1mCw\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u5148\u6765\u770b\u4e00\u7ec4\u6d4b\u8bd5\u6570\u636e\uff0c\u8fd9\u7ec4\u6570\u636e\u662f\u5728mysql8.0 \u7684\u7248\u672c\uff0c\u5e76\u4e14\u662f\u5728\u6211\u672c\u673a\u4e0a\uff0c\u7531\u4e8e\u672c\u673a\u8fd8\u8dd1\u7740idea ,\u6d4f\u89c8\u5668\u7b49\u5404\u79cd\u5de5\u5177\uff0c\u6240\u4ee5\u5e76\u4e0d\u662f\u673a\u5668\u914d\u7f6e\u5c31\u662f\u7528\u4e8e\u6570\u636e\u5e93\u914d\u7f6e\uff0c\u6240\u4ee5\u6d4b\u8bd5\u6570\u636e\u53ea\u9650\u4e8e\u53c2\u8003\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232100\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232101\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u770b\u5230\u8fd9\u7ec4\u6570\u636e\u4f3c\u4e4e\u597d\u50cf\u771f\u7684\u548c\u6807\u9898\u5bf9\u5e94\uff0c\u5f53\u6570\u636e\u8fbe\u52302000w \u4ee5\u540e\uff0c\u67e5\u8be2\u65f6\u957f\u6025\u5267\u4e0a\u5347\uff1b\u96be\u9053\u8fd9\u5c31\u662f\u94c1\u5f8b\u5417\uff1f\u90a3\u4e0b\u9762\u6211\u4eec\u5c31\u6765\u770b\u770b\u8fd9\u4e2a\u5efa\u8bae\u503c2kw \u662f\u600e\u4e48\u6765\u7684\uff1f<\/p>\n<p>3 \u5355\u8868\u6570\u91cf\u9650\u5236<\/p>\n<p>\u9996\u5148\u6211\u4eec\u5148\u60f3\u60f3\u6570\u636e\u5e93\u5355\u8868\u884c\u6570\u6700\u5927\u591a\u5927\uff1f<br \/><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc1mCA\" alt=\"image.png\" title=\"image.png\" loading=\"lazy\"><\/p>\n<p>\u770b\u770b\u4e0a\u9762\u7684\u5efa\u8868sql\uff0cid 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,\u90a3\u4e48\u81ea\u589e\u957f\u6700\u5927\u503c\u662f18446744073709551615\uff0c\u6309\u7167\u4e00\u79d2\u65b0\u589e\u4e00\u6761\u8bb0\u5f55\u7684\u901f\u5ea6\uff0c\u5927\u7ea6\u4ec0\u4e48\u65f6\u5019\u80fd\u7528\u5b8c\uff1f<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232102\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>4 \u8868\u7a7a\u95f4<\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u518d\u6765\u770b\u770b\u7d22\u5f15\u7684\u7ed3\u6784\uff0c\u5bf9\u4e86\uff0c\u6211\u4eec\u4e0b\u9762\u8bb2\u5185\u5bb9\u90fd\u662f\u57fa\u4e8eInnodb \u5f15\u64ce\u7684\uff0c\u5927\u5bb6\u90fd\u77e5\u9053Innodb \u7684\u7d22\u5f15\u5185\u90e8\u7528\u7684\u662fB+ \u6811<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232103\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u5f20\u8868\u6570\u636e\uff0c\u5728\u786c\u76d8\u4e0a\u5b58\u50a8\u4e5f\u662f\u7c7b\u4f3c\u5982\u6b64\u7684\uff0c\u5b83\u5b9e\u9645\u662f\u653e\u5728\u4e00\u4e2a\u53ebperson.ibd \uff08innodb data\uff09\u7684\u6587\u4ef6\u4e2d\uff0c\u4e5f\u53eb\u505a\u8868\u7a7a\u95f4;\u867d\u7136\u6570\u636e\u8868\u4e2d\uff0c\u4ed6\u4eec\u770b\u8d77\u6765\u662f\u4e00\u6761\u8fde\u7740\u4e00\u6761\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u5728\u6587\u4ef6\u4e2d\u5b83\u88ab\u5206\u6210\u5f88\u591a\u5c0f\u4efd\u7684\u6570\u636e\u9875\uff0c\u800c\u4e14\u6bcf\u4e00\u4efd\u90fd\u662f16K\u3002\u5927\u6982\u5c31\u50cf\u4e0b\u9762\u8fd9\u6837\uff0c\u5f53\u7136\u8fd9\u53ea\u662f\u6211\u4eec\u62bd\u8c61\u51fa\u6765\u7684\uff0c\u5728\u8868\u7a7a\u95f4\u4e2d\u8fd8\u6709\u6bb5\u3001\u533a\u3001\u7ec4\u7b49\u5f88\u591a\u6982\u5ff5\uff0c\u4f46\u662f\u6211\u4eec\u9700\u8981\u8df3\u51fa\u6765\u770b\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232104\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>5 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Directory\uff09;\u6240\u4ee5\u5b9e\u9645\u9875\u7684\u5185\u90e8\u7ed3\u6784\u50cf\u662f\u4e0b\u9762\u8fd9\u6837\u7684\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232105\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u4ece\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u4e00\u4e2aInnoDB\u6570\u636e\u9875\u7684\u5b58\u50a8\u7a7a\u95f4\u5927\u81f4\u88ab\u5212\u5206\u6210\u4e867\u4e2a\u90e8\u5206\uff0c\u6709\u7684\u90e8\u5206\u5360\u7528\u7684\u5b57\u8282\u6570\u662f\u786e\u5b9a\u7684\uff0c\u6709\u7684\u90e8\u5206\u5360\u7528\u7684\u5b57\u8282\u6570\u662f\u4e0d\u786e\u5b9a\u7684\u3002<\/p>\n<p>\u5728\u9875\u76847\u4e2a\u7ec4\u6210\u90e8\u5206\u4e2d\uff0c\u6211\u4eec\u81ea\u5df1\u5b58\u50a8\u7684\u8bb0\u5f55\u4f1a\u6309\u7167\u6211\u4eec\u6307\u5b9a\u7684\u884c\u683c\u5f0f\u5b58\u50a8\u5230User Records\u90e8\u5206\u3002<\/p>\n<p>\u4f46\u662f\u5728\u4e00\u5f00\u59cb\u751f\u6210\u9875\u7684\u65f6\u5019\uff0c\u5176\u5b9e\u5e76\u6ca1\u6709User Records\u8fd9\u4e2a\u90e8\u5206\uff0c\u6bcf\u5f53\u6211\u4eec\u63d2\u5165\u4e00\u6761\u8bb0\u5f55\uff0c\u90fd\u4f1a\u4eceFree Space\u90e8\u5206\uff0c\u4e5f\u5c31\u662f\u5c1a\u672a\u4f7f\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u4e2d\u7533\u8bf7\u4e00\u4e2a\u8bb0\u5f55\u5927\u5c0f\u7684\u7a7a\u95f4\u5212\u5206\u5230User Records\u90e8\u5206\uff0c\u5f53Free Space\u90e8\u5206\u7684\u7a7a\u95f4\u5168\u90e8\u88abUser Records\u90e8\u5206\u66ff\u4ee3\u6389\u4e4b\u540e\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u8fd9\u4e2a\u9875\u4f7f\u7528\u5b8c\u4e86\uff0c\u5982\u679c\u8fd8\u6709\u65b0\u7684\u8bb0\u5f55\u63d2\u5165\u7684\u8bdd\uff0c\u5c31\u9700\u8981\u53bb\u7533\u8bf7\u65b0\u7684\u9875\u4e86\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u7684\u56fe\u793a\u5982\u4e0b\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232106\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u521a\u521a\u4e0a\u9762\u8bf4\u5230\u4e86\u6570\u636e\u7684\u65b0\u589e\u7684\u8fc7\u7a0b\u3002<\/p>\n<p>\u90a3\u4e0b\u9762\u5c31\u6765\u8bf4\u8bf4\uff0c\u6570\u636e\u7684\u67e5\u627e\u8fc7\u7a0b\uff0c\u5047\u5982\u6211\u4eec\u9700\u8981\u67e5\u627e\u4e00\u6761\u8bb0\u5f55\uff0c\u6211\u4eec\u53ef\u4ee5\u628a\u8868\u7a7a\u95f4\u4e2d\u7684\u6bcf\u4e00\u9875\u90fd\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u7136\u540e\u5bf9\u8bb0\u5f55\u6328\u4e2a\u5224\u65ad\u662f\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\uff0c\u5728\u6570\u636e\u91cf\u5c0f\u7684\u65f6\u5019\uff0c\u6ca1\u5565\u95ee\u9898\uff0c\u5185\u5b58\u4e5f\u53ef\u4ee5\u6491\uff1b\u4f46\u662f\u73b0\u5b9e\u5c31\u662f\u8fd9\u4e48\u6b8b\u9177\uff0c\u4e0d\u4f1a\u7ed9\u4f60\u8fd9\u4e2a\u5c40\u9762\uff1b\u4e3a\u4e86\u89e3\u51b3\u8fd9\u95ee\u9898\uff0cmysql 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referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232107\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u770b\u5230\u8fd9\u4e2a\u56fe\u4e4b\u540e\uff0c\u662f\u4e0d\u662f\u6709\u70b9\u4f3c\u66fe\u76f8\u4f3c\u7684\u611f\u89c9\uff0c\u662f\u4e0d\u662f\u50cf\u4e00\u68f5\u4e8c\u53c9\u6811\u554a\uff0c\u5bf9\uff0c\u6ca1\u9519\uff01\u5b83\u5c31\u662f\u4e00\u68f5\u6811\uff0c\u53ea\u4e0d\u8fc7\u6211\u4eec\u5728\u8fd9\u91cc\u53ea\u662f\u7b80\u5355\u753b\u4e86\u4e09\u4e2a\u8282\u70b9\uff0c2\u5c42\u7ed3\u6784\u7684\u800c\u5df2\uff0c\u5982\u679c\u6570\u636e\u591a\u4e86\uff0c\u53ef\u80fd\u5c31\u4f1a\u6269\u5c55\u52303\u5c42\u7684\u6811\uff0c\u8fd9\u4e2a\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684B+ \u6811\uff0c\u6700\u4e0b\u9762\u90a3\u4e00\u5c42\u7684page level =0,\u4e5f\u5c31\u662f\u53f6\u5b50\u8282\u70b9\uff0c\u5176\u4f59\u90fd\u662f\u975e\u53f6\u5b50\u8282\u70b9\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232108\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u770b\u4e0a\u56fe\u4e2d\uff0c\u6211\u4eec\u662f\u5355\u62ff\u4e00\u4e2a\u8282\u70b9\u6765\u770b\uff0c\u9996\u5148\u5b83\u662f\u4e00\u4e2a\u975e\u53f6\u5b50\u8282\u70b9\uff08\u7d22\u5f15\u9875\uff09\uff0c\u5728\u5b83\u7684\u5185\u5bb9\u533a\u4e2d\u6709id \u548c \u9875\u53f7\u5730\u5740\u4e24\u90e8\u5206\uff0c\u8fd9\u4e2aid \u662f\u5bf9\u5e94\u9875\u4e2d\u8bb0\u5f55\u7684\u6700\u5c0f\u8bb0\u5f55id \u503c\uff0c\u9875\u53f7\u5730\u5740\u662f\u6307\u5411\u5bf9\u5e94\u9875\u7684\u6307\u9488\uff1b\u800c\u6570\u636e\u9875\u4e0e\u6b64\u51e0\u4e4e\u5927\u540c\u5c0f\u5f02\uff0c\u533a\u522b\u5728\u4e8e\u6570\u636e\u9875\u8bb0\u5f55\u7684\u662f\u771f\u5b9e\u7684\u884c\u6570\u636e\u800c\u4e0d\u662f\u9875\u5730\u5740\uff0c\u800c\u4e14id \u7684\u4e5f\u662f\u987a\u5e8f\u7684\u3002<\/p>\n<p>7 \u5355\u8868\u5efa\u8bae\u503c<\/p>\n<p>\u4e0b\u9762\u6211\u4eec\u5c31\u4ee53\u5c42\uff0c2\u5206\u53c9\uff08\u5b9e\u9645\u4e2d\u662fM\u5206\u53c9\uff09\u7684\u56fe\u4f8b\u6765\u8bf4\u660e\u4e00\u4e0b\u67e5\u627e\u4e00\u4e2a\u884c\u6570\u636e\u7684\u8fc7\u7a0b\u3002<\/p>\n<p>\u6bd4\u5982\u8bf4\u6211\u4eec\u9700\u8981\u67e5\u627e\u4e00\u4e2aid=6 \u7684\u884c\u6570\u636e\uff0c\u56e0\u4e3a\u5728\u975e\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u653e\u7684\u662f\u9875\u53f7\u548c\u8be5\u9875\u6700\u5c0f\u7684id\uff0c\u6240\u4ee5\u6211\u4eec\u4ece\u9876\u5c42\u5f00\u59cb\u5bf9\u6bd4\uff0c\u9996\u5148\u770b\u9875\u53f710 \u4e2d\u7684\u76ee\u5f55\uff0c\u6709[id=1,\u9875\u53f7=20],[id=5,\u9875\u53f7=30],\u8bf4\u660e\u5de6\u4fa7\u8282\u70b9\u6700\u5c0fid\u4e3a1\uff0c\u53f3\u4fa7\u8282\u70b9\u6700\u5c0fid \u662f5\uff1b6&gt;5,\u90a3\u6309\u7167\u4e8c\u5206\u6cd5\u67e5\u627e\u7684\u89c4\u5219\uff0c\u80af\u5b9a\u5c31\u5f80\u53f3\u4fa7\u8282\u70b9\u7ee7\u7eed\u67e5\u627e\uff0c\u627e\u5230\u9875\u53f730\u7684\u8282\u70b9\u540e\uff0c\u53d1\u73b0\u8fd9\u4e2a\u8282\u70b9\u8fd8\u6709\u5b50\u8282\u70b9\uff08\u975e\u53f6\u5b50\u8282\u70b9\uff09\uff0c\u90a3\u5c31\u7ee7\u7eed\u6bd4\u5bf9\uff0c\u540c\u7406\uff0c6&gt;5&#038;&#038;6&lt;7,\u6240\u4ee5\u627e\u5230\u4e86\u9875\u53f760\uff0c\u627e\u5230\u9875\u53f760\u4e4b\u540e\uff0c\u53d1\u73b0\u6b64\u8282\u70b9\u4e3a\u53f6\u5b50\u8282\u70b9\uff08\u6570\u636e\u8282\u70b9\uff09\uff0c\u4e8e\u662f\u5c06\u6b64\u9875\u6570\u636e\u52a0\u8f7d\u81f3\u5185\u5b58\u8fdb\u884c\u4e00\u4e00\u5bf9\u6bd4\uff0c\u7ed3\u679c\u627e\u5230\u4e86id=6 \u7684\u6570\u636e\u884c\u3002<\/p>\n<p>\u4ece\u4e0a\u8ff0\u7684\u8fc7\u7a0b\u4e2d\u53d1\u73b0\uff0c\u6211\u4eec\u4e3a\u4e86\u67e5\u627eid=6 \u7684\u6570\u636e\uff0c\u603b\u5171\u67e5\u8be2\u4e86\u4e09\u4e2a\u9875\uff0c\u5982\u679c\u4e09\u4e2a\u9875\u90fd\u5728\u78c1\u76d8\u4e2d\uff08\u672a\u63d0\u524d\u52a0\u8f7d\u81f3\u5185\u5b58\uff09\uff0c\u90a3\u4e48\u6700\u591a\u9700\u8981\u7ecf\u5386\u4e09\u6b21\u7684\u78c1\u76d8IO\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u56fe\u4e2d\u7684\u9875\u53f7\u53ea\u662f\u4e2a\u793a\u4f8b\uff0c\u5b9e\u9645\u60c5\u51b5\u4e0b\u5e76\u4e0d\u662f\u8fde\u7eed\u7684\uff0c\u5728\u78c1\u76d8\u4e2d\u5b58\u50a8\u4e5f\u4e0d\u4e00\u5b9a\u662f\u987a\u5e8f\u7684\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232109\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>\u81f3\u6b64\uff0c\u6211\u4eec\u5927\u6982\u5df2\u7ecf\u4e86\u89e3\u4e86\u8868\u7684\u6570\u636e\u662f\u600e\u4e48\u4e2a\u7ed3\u6784\u4e86\uff0c\u4e5f\u5927\u6982\u77e5\u9053\u67e5\u8be2\u6570\u636e\u662f\u4e2a\u600e\u4e48\u7684\u8fc7\u7a0b\u4e86\uff0c\u8fd9\u6837\u6211\u4eec\u4e5f\u5c31\u80fd\u5927\u6982\u4f30\u7b97\u8fd9\u6837\u7684\u7ed3\u6784\u80fd\u5b58\u653e\u591a\u5c11\u6570\u636e\u4e86\u3002<\/p>\n<p>\u4ece\u4e0a\u9762\u7684\u56fe\u89e3\u6211\u4eec\u77e5\u9053B+ \u6570\u7684\u53f6\u5b50\u8282\u70b9\u624d\u662f\u5b58\u5728\u6570\u636e\u7684\uff0c\u800c\u975e\u53f6\u5b50\u8282\u70b9\u662f\u7528\u6765\u5b58\u653e\u7d22\u5f15\u6570\u636e\u7684\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u540c\u6837\u4e00\u4e2a16K \u7684\u9875\uff0c\u975e\u53f6\u5b50\u8282\u70b9\u91cc\u7684\u6bcf\u6761\u6570\u636e\u90fd\u6307\u5411\u65b0\u7684\u9875\uff0c\u800c\u65b0\u7684\u9875\u6709\u4e24\u79cd\u53ef\u80fd<\/p>\n<p>\u5982\u679c\u662f\u53f6\u5b50\u8282\u70b9\uff0c\u90a3\u4e48\u91cc\u9762\u5c31\u662f\u4e00\u884c\u884c\u7684\u6570\u636e<br \/>\u5982\u679c\u662f\u975e\u53f6\u5b50\u8282\u70b9\u7684\u8bdd\uff0c\u90a3\u4e48\u5c31\u4f1a\u7ee7\u7eed\u6307\u5411\u65b0\u7684\u9875<\/p>\n<p>\u5047\u8bbe<\/p>\n<p>\u975e\u53f6\u5b50\u8282\u70b9\u5185\u6307\u5411\u5176\u4ed6\u9875\u7684\u6570\u91cf\u4e3a x<br \/>\u53f6\u5b50\u8282\u70b9\u5185\u80fd\u5bb9\u7eb3\u7684\u6570\u636e\u884c\u6570\u4e3a y<br \/>B+ \u6570\u7684\u5c42\u6570\u4e3a z<\/p>\n<p>\u5982\u4e0b\u56fe\u4e2d\u6240\u793a<br \/>Total =x^(z-1) *y \u4e5f\u5c31\u662f\u8bf4\u603b\u6570\u4f1a\u7b49\u4e8e x \u7684z-1 \u6b21\u65b9 \u4e0eY \u7684\u4e58\u79ef\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/remote\/1460000042232110\" alt=\"\u56fe\u7247\" title=\"\u56fe\u7247\" loading=\"lazy\"><\/p>\n<p>X =\uff1f<br \/>\u5728\u6587\u7ae0\u7684\u5f00\u5934\u5df2\u7ecf\u4ecb\u7ecd\u4e86\u9875\u7684\u7ed3\u6784\uff0c\u7d22\u5f15\u4e5f\u4e5f\u4e0d\u4f8b\u5916\uff0c\u90fd\u4f1a\u6709File Header(38 byte)\u3001Page Header (56 Byte)\u3001Infimum + Supermum\uff0826 byte\uff09\u3001File Trailer\uff088byte\uff09,\u518d\u52a0\u4e0a\u9875\u76ee\u5f55\uff0c\u5927\u69821k \u5de6\u53f3\uff0c\u6211\u4eec\u5c31\u5f53\u505a\u5b83\u5c31\u662f1K,\u90a3\u6574\u4e2a\u9875\u7684\u5927\u5c0f\u662f16K,\u5269\u4e0b15k\u7528\u4e8e\u5b58\u6570\u636e\uff0c\u5728\u7d22\u5f15\u9875\u4e2d\u4e3b\u8981\u8bb0\u5f55\u7684\u662f\u4e3b\u952e\u4e0e\u9875\u53f7\uff0c\u4e3b\u952e\u6211\u4eec\u5047\u8bbe\u662fBigint(8 byte),\u800c\u9875\u53f7\u4e5f\u662f\u56fa\u5b9a\u7684\uff084Byte\uff09,\u90a3\u4e48\u7d22\u5f15\u9875\u4e2d\u7684\u4e00\u6761\u6570\u636e\u4e5f\u5c31\u662f12byte; \u6240\u4ee5x=15*1024\/12\u22481280 \u884c\u3002<\/p>\n<p>Y=\uff1f<br \/>\u53f6\u5b50\u8282\u70b9\u548c\u975e\u53f6\u5b50\u8282\u70b9\u7684\u7ed3\u6784\u662f\u4e00\u6837\u7684\uff0c\u540c\u7406\uff0c\u80fd\u653e\u6570\u636e\u7684\u7a7a\u95f4\u4e5f\u662f15k\uff1b\u4f46\u662f\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u653e\u7684\u662f\u771f\u6b63\u7684\u884c\u6570\u636e\uff0c\u8fd9\u4e2a\u5f71\u54cd\u7684\u56e0\u7d20\u5c31\u4f1a\u591a\u5f88\u591a\uff0c\u6bd4\u5982\uff0c\u5b57\u6bb5\u7684\u7c7b\u578b\uff0c\u5b57\u6bb5\u7684\u6570\u91cf\uff1b\u6bcf\u884c\u6570\u636e\u5360\u7528\u7a7a\u95f4\u8d8a\u5927\uff0c\u9875\u4e2d\u6240\u653e\u7684\u884c\u6570\u91cf\u5c31\u4f1a\u8d8a\u5c11\uff1b\u8fd9\u8fb9\u6211\u4eec\u6682\u65f6\u6309\u4e00\u6761\u884c\u6570\u636e1k \u6765\u7b97\uff0c\u90a3\u4e00\u9875\u5c31\u80fd\u5b58\u4e0b15\u6761\uff0cY\u224815\u3002<\/p>\n<p>\u7b97\u5230\u8fd9\u8fb9\u4e86\uff0c\u662f\u4e0d\u662f\u5fc3\u91cc\u5df2\u7ecf\u6709\u8c31\u4e86\u554a<\/p>\n<p>\u6839\u636e\u4e0a\u8ff0\u7684\u516c\u5f0f\uff0cTotal =x^(z-1)\u00a0y\uff0c\u5df2\u77e5 x=1280,y=15<br \/>\u5047\u8bbeB+ \u6811\u662f\u4e24\u5c42\uff0c\u90a3\u5c31\u662fZ =2\uff0c Total = \uff081280 ^1 \uff0915 = 19200<br \/>\u5047\u8bbeB+ \u6811\u662f\u4e09\u5c42\uff0c\u90a3\u5c31\u662fZ =3\uff0c Total = \uff081280 ^2\uff09 *15 = 24576000 \uff08\u7ea62.45kw\uff09<\/p>\n<p>\u54ce\u5440\uff0c\u5988\u5440\uff01 \u8fd9\u4e0d\u662f\u6b63\u597d\u5c31\u662f\u6587\u7ae0\u5f00\u5934\u8bf4\u7684\u6700\u5927\u884c\u6570\u5efa\u8bae\u503c 2000w\u561b\uff01\u5bf9\u7684\uff0c\u4e00\u822cB+ \u6570\u7684\u5c42\u7ea7\u6700\u591a\u4e5f\u5c31\u662f3\u5c42\uff0c\u4f60\u8bd5\u60f3\u4e00\u4e0b\uff0c\u5982\u679c\u662f4\u5c42\uff0c\u9664\u4e86\u67e5\u8be2\u7684\u65f6\u5019\u78c1\u76d8IO\u6b21\u6570\u4f1a\u589e\u52a0\uff0c\u800c\u4e14\u8fd9\u4e2aTotal \u503c\u4f1a\u662f\u591a\u5c11\uff0c\u5927\u6982\u5e94\u8be5\u662f3\u767e\u591a\u4ebf\u5427\uff0c\u4e5f\u4e0d\u592a\u5408\u7406\uff0c\u6240\u4ee5\uff0c3\u5c42\u5e94\u8be5\u662f\u6bd4\u8f83\u5408\u7406\u7684\u4e00\u4e2a\u503c\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\u96be\u9053\u5c31\u5b8c\u4e86\uff1f<\/p>\n<p>\u4e0d<\/p>\n<p>\u6211\u4eec\u521a\u521a\u5728\u8bf4Y \u7684\u503c\u65f6\u5019\u5047\u8bbe\u7684\u662f1K \uff0c\u90a3\u6bd4\u5982\u6211\u5b9e\u9645\u5f53\u884c\u7684\u6570\u636e\u5360\u7528\u7a7a\u95f4\u4e0d\u662f1K ,\u800c\u662f5K,\u90a3\u4e48\u5355\u4e2a\u6570\u636e\u9875\u6700\u591a\u53ea\u80fd\u653e\u4e0b3\u6761\u6570\u636e<\/p>\n<p>\u540c\u6837\uff0c\u8fd8\u662f\u6309\u7167Z=3 \u7684\u503c\u6765\u8ba1\u7b97\uff0c\u90a3Total = \uff081280 ^2\uff09 *3 = 4915200 \uff08\u8fd1500w\uff09<\/p>\n<p>\u6240\u4ee5\uff0c\u5728\u4fdd\u6301\u76f8\u540c\u7684\u5c42\u7ea7\uff08\u76f8\u4f3c\u67e5\u8be2\u6027\u80fd\uff09\u7684\u60c5\u51b5\u4e0b\uff0c\u5728\u884c\u6570\u636e\u5927\u5c0f\u4e0d\u540c\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u5b9e\u8fd9\u4e2a\u6700\u5927\u5efa\u8bae\u503c\u4e5f\u662f\u4e0d\u540c\u7684\uff0c\u800c\u4e14\u5f71\u54cd\u67e5\u8be2\u6027\u80fd\u7684\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u56e0\u7d20\uff0c\u6bd4\u5982\uff0c\u6570\u636e\u5e93\u7248\u672c\uff0c\u670d\u52a1\u5668\u914d\u7f6e\uff0csql \u7684\u7f16\u5199\u7b49\u7b49\uff0cMySQL \u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u4f1a\u5c06\u8868\u7684\u7d22\u5f15\u88c5\u8f7d\u5230\u5185\u5b58\u4e2d\u3002\u5728InnoDB buffer size \u8db3\u591f\u7684\u60c5\u51b5\u4e0b\uff0c\u5176\u80fd\u5b8c\u6210\u5168\u52a0\u8f7d\u8fdb\u5185\u5b58\uff0c\u67e5\u8be2\u4e0d\u4f1a\u6709\u95ee\u9898\u3002\u4f46\u662f\uff0c\u5f53\u5355\u8868\u6570\u636e\u5e93\u5230\u8fbe\u67d0\u4e2a\u91cf\u7ea7\u7684\u4e0a\u9650\u65f6\uff0c\u5bfc\u81f4\u5185\u5b58\u65e0\u6cd5\u5b58\u50a8\u5176\u7d22\u5f15\uff0c\u4f7f\u5f97\u4e4b\u540e\u7684 SQL \u67e5\u8be2\u4f1a\u4ea7\u751f\u78c1\u76d8 IO\uff0c\u4ece\u800c\u5bfc\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u6240\u4ee5\u589e\u52a0\u786c\u4ef6\u914d\u7f6e\uff08\u6bd4\u5982\u628a\u5185\u5b58\u5f53\u78c1\u76d8\u4f7f\uff09\uff0c\u53ef\u80fd\u4f1a\u5e26\u6765\u7acb\u7aff\u89c1\u5f71\u7684\u6027\u80fd\u63d0\u5347\u54c8\u3002<\/p>\n<p>8 \u603b\u7ed3<\/p>\n<p>Mysql \u7684\u8868\u6570\u636e\u662f\u4ee5\u9875\u7684\u5f62\u5f0f\u5b58\u653e\u7684\uff0c\u9875\u5728\u78c1\u76d8\u4e2d\u4e0d\u4e00\u5b9a\u662f\u8fde\u7eed\u7684\u3002<br \/>\u9875\u7684\u7a7a\u95f4\u662f16K,\u5e76\u4e0d\u662f\u6240\u6709\u7684\u7a7a\u95f4\u90fd\u662f\u7528\u6765\u5b58\u653e\u6570\u636e\u7684\uff0c\u4f1a\u6709\u4e00\u4e9b\u56fa\u5b9a\u7684\u4fe1\u606f\uff0c\u5982\uff0c\u9875\u5934\uff0c\u9875\u5c3e\uff0c\u9875\u7801\uff0c\u6821\u9a8c\u7801\u7b49\u7b49\u3002<br \/>\u5728B+ \u6811\u4e2d\uff0c\u53f6\u5b50\u8282\u70b9\u548c\u975e\u53f6\u5b50\u8282\u70b9\u7684\u6570\u636e\u7ed3\u6784\u662f\u4e00\u6837\u7684\uff0c\u533a\u522b\u5728\u4e8e\uff0c\u53f6\u5b50\u8282\u70b9\u5b58\u653e\u7684\u662f\u5b9e\u9645\u7684\u884c\u6570\u636e\uff0c\u800c\u975e\u53f6\u5b50\u8282\u70b9\u5b58\u653e\u7684\u662f\u4e3b\u952e\u548c\u9875\u53f7\u3002<br \/>\u7d22\u5f15\u7ed3\u6784\u4e0d\u4f1a\u5f71\u54cd\u5355\u8868\u6700\u5927\u884c\u6570\uff0c2kw\u4e5f\u53ea\u662f\u63a8\u8350\u503c\uff0c\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u503c\u53ef\u80fd\u4f1a\u5bfc\u81f4B+\u6811\u5c42\u7ea7\u66f4\u9ad8\uff0c\u5f71\u54cd\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n<p>9 \u53c2\u8003<br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=0b55oa2sQ4joyoRJZiQoEw%3D%3D.1TfjMEwtFoeen56eU4a8kSt2YrWMI7dGnSj8lVcDt65trfxn%2BX4UCN5Ots5543bZ\" rel=\"nofollow\">https:\/\/www.jianshu.com\/p\/cf5&#8230;<\/a><br \/><a href=\"https:\/\/link.segmentfault.com\/?enc=cPaNhr4WVZOXkZoxhHyXcA%3D%3D.OhaB9yg7aLql3DWddenAQezd%2FRnABBJZtFUph2SWfXk%3D\" rel=\"nofollow\">https:\/\/www.modb.pro\/db\/139052<\/a><br \/>\u300aMYSQL\u5185\u6838\uff1aINNODB\u5b58\u50a8\u5f15\u64ce \u53771\u300b<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042232098\">https:\/\/segmentfault.com\/a\/1190000042232098<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1 \u80cc\u666f \u4f5c\u4e3a\u5728\u540e\u7aef\u5708\u5f00\u8f66\u7684\u591a\u5e74\u8001\u53f8\u673a\uff0c\u662f\u4e0d\u662f\u7ecf\u5e38\u542c\u5230\u8fc7\uff0c\u201cmysql \u5355\u8868\u6700\u597d\u4e0d\u8981\u8d85\u8fc72000w\u201d,\u201c\u5355\u8868\u8d85 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006030","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006030","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006030"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006030\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}