{"id":191500,"date":"2024-11-12T16:56:20","date_gmt":"2024-11-12T08:56:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/191500\/"},"modified":"2024-11-12T16:56:22","modified_gmt":"2024-11-12T08:56:22","slug":"%e8%a9%b3%e8%a7%a3oracle%e5%84%aa%e5%8c%96%e5%99%a8%e7%9a%843%e4%b8%8d%e5%90%8c%e9%a1%9e%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/191500\/","title":{"rendered":"\u8a73\u89e3Oracle\u512a\u5316\u5668\u76843\u4e0d\u540c\u985e\u578b"},"content":{"rendered":"<h1 id=\"%e8%a9%b3%e8%a7%a3oracle%e5%84%aa%e5%8c%96%e5%99%a8%e7%9a%843%e4%b8%8d%e5%90%8c%e9%a1%9e%e5%9e%8b-NOiByIElvu\">\u8a73\u89e3Oracle\u512a\u5316\u5668\u76843\u4e0d\u540c\u985e\u578b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u512a\u5316\u5668\u662f\u95dc\u9375\u7d44\u4ef6\u4e4b\u4e00\uff0c\u8ca0\u8cac\u6c7a\u5b9a\u5982\u4f55\u57f7\u884cSQL\u67e5\u8a62\u3002Oracle\u6578\u64da\u5eab\u7684\u512a\u5316\u5668\u6709\u4e09\u7a2e\u4e3b\u8981\u985e\u578b\uff1a\u898f\u5247\u57fa\u790e\u512a\u5316\u5668\u3001\u6210\u672c\u57fa\u790e\u512a\u5316\u5668\u548c\u81ea\u9069\u61c9\u512a\u5316\u5668\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e09\u7a2e\u512a\u5316\u5668\u7684\u7279\u9ede\u53ca\u5176\u9069\u7528\u60c5\u5883\u3002<\/p>\n<h2 id=\"1-%e8%a6%8f%e5%89%87%e5%9f%ba%e7%a4%8e%e5%84%aa%e5%8c%96%e5%99%a8-NOiByIElvu\">1. \u898f\u5247\u57fa\u790e\u512a\u5316\u5668<\/h2>\n<p>\u898f\u5247\u57fa\u790e\u512a\u5316\u5668\uff08Rule-Based Optimizer\uff0cRBO\uff09\u662fOracle\u65e9\u671f\u7248\u672c\u4e2d\u4f7f\u7528\u7684\u512a\u5316\u5668\u3002\u5b83\u4f9d\u8cf4\u65bc\u4e00\u7d44\u56fa\u5b9a\u7684\u898f\u5247\u4f86\u6c7a\u5b9a\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u9019\u4e9b\u898f\u5247\u57fa\u65bc\u6578\u64da\u5eab\u7684\u7d50\u69cb\u548c\u7d22\u5f15\u7684\u5b58\u5728\u8207\u5426\uff0c\u4e26\u4e14\u4e0d\u8003\u616e\u6578\u64da\u7684\u5be6\u969b\u5206\u4f48\u60c5\u6cc1\u3002<\/p>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>\u7c21\u55ae\u6613\u61c2\uff0c\u5c0d\u65bc\u5c0f\u578b\u6578\u64da\u96c6\u6216\u7c21\u55ae\u67e5\u8a62\uff0c\u6027\u80fd\u8868\u73fe\u826f\u597d\u3002<\/li>\n<li><strong>\u7f3a\u9ede\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u898f\u5247\u57fa\u790e\u512a\u5316\u5668\u7684\u6548\u7387\u6703\u4e0b\u964d\uff0c\u56e0\u70ba\u5b83\u7121\u6cd5\u6839\u64da\u5be6\u969b\u6578\u64da\u7684\u7279\u6027\u9032\u884c\u8abf\u6574\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\uff0c\u5982\u679c\u6709\u7d22\u5f15\u53ef\u7528\uff0c\u898f\u5247\u57fa\u790e\u512a\u5316\u5668\u6703\u9078\u64c7\u4f7f\u7528\u8a72\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\u3002\u7136\u800c\uff0c\u5c0d\u65bc\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u9019\u7a2e\u65b9\u6cd5\u53ef\u80fd\u7121\u6cd5\u63d0\u4f9b\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<h2 id=\"2-%e6%88%90%e6%9c%ac%e5%9f%ba%e7%a4%8e%e5%84%aa%e5%8c%96%e5%99%a8-NOiByIElvu\">2. \u6210\u672c\u57fa\u790e\u512a\u5316\u5668<\/h2>\n<p>\u6210\u672c\u57fa\u790e\u512a\u5316\u5668\uff08Cost-Based Optimizer\uff0cCBO\uff09\u662fOracle\u6578\u64da\u5eab\u7684\u4e3b\u8981\u512a\u5316\u5668\uff0c\u5f9eOracle 7\u7248\u672c\u958b\u59cb\u5f15\u5165\u3002CBO\u6839\u64da\u7d71\u8a08\u4fe1\u606f\u4f86\u8a55\u4f30\u4e0d\u540c\u57f7\u884c\u8a08\u5283\u7684\u6210\u672c\uff0c\u4e26\u9078\u64c7\u6210\u672c\u6700\u4f4e\u7684\u8a08\u5283\u4f86\u57f7\u884c\u67e5\u8a62\u3002<\/p>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>\u80fd\u5920\u6839\u64da\u5be6\u969b\u6578\u64da\u7684\u5206\u4f48\u548c\u5927\u5c0f\u4f86\u9078\u64c7\u6700\u4f73\u7684\u57f7\u884c\u8a08\u5283\uff0c\u9069\u7528\u65bc\u5927\u578b\u6578\u64da\u96c6\u548c\u8907\u96dc\u67e5\u8a62\u3002<\/li>\n<li><strong>\u7f3a\u9ede\uff1a<\/strong>\u9700\u8981\u5b9a\u671f\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff0c\u5426\u5247\u53ef\u80fd\u5c0e\u81f4\u4e0d\u6e96\u78ba\u7684\u6210\u672c\u4f30\u7b97\uff0c\u5f9e\u800c\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5c0d\u65bc\u4e00\u500b\u5305\u542b\u591a\u500b\u8868\u7684\u806f\u63a5\u67e5\u8a62\uff0cCBO\u6703\u8003\u616e\u6bcf\u500b\u8868\u7684\u5927\u5c0f\u3001\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\u4ee5\u53ca\u6578\u64da\u7684\u5206\u4f48\uff0c\u5f9e\u800c\u9078\u64c7\u6700\u6709\u6548\u7684\u806f\u63a5\u9806\u5e8f\u548c\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"3-%e8%87%aa%e9%81%a9%e6%87%89%e5%84%aa%e5%8c%96%e5%99%a8-NOiByIElvu\">3. \u81ea\u9069\u61c9\u512a\u5316\u5668<\/h2>\n<p>\u81ea\u9069\u61c9\u512a\u5316\u5668\uff08Adaptive Optimizer\uff09\u662fOracle 12c\u53ca\u4ee5\u5f8c\u7248\u672c\u4e2d\u5f15\u5165\u7684\u4e00\u7a2e\u65b0\u578b\u512a\u5316\u5668\u3002\u5b83\u7d50\u5408\u4e86\u898f\u5247\u57fa\u790e\u548c\u6210\u672c\u57fa\u790e\u512a\u5316\u5668\u7684\u7279\u9ede\uff0c\u80fd\u5920\u5728\u67e5\u8a62\u57f7\u884c\u904e\u7a0b\u4e2d\u6839\u64da\u5be6\u969b\u57f7\u884c\u60c5\u6cc1\u52d5\u614b\u8abf\u6574\u57f7\u884c\u8a08\u5283\u3002<\/p>\n<ul>\n<li><strong>\u512a\u9ede\uff1a<\/strong>\u80fd\u5920\u6839\u64da\u5be6\u969b\u57f7\u884c\u7684\u6578\u64da\u4f86\u8abf\u6574\u67e5\u8a62\u8a08\u5283\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u7f3a\u9ede\uff1a<\/strong>\u5be6\u73fe\u8f03\u70ba\u8907\u96dc\uff0c\u53ef\u80fd\u9700\u8981\u66f4\u591a\u7684\u8cc7\u6e90\u4f86\u9032\u884c\u8a08\u5283\u7684\u8abf\u6574\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u5728\u57f7\u884c\u4e00\u500b\u9577\u6642\u9593\u904b\u884c\u7684\u67e5\u8a62\u6642\uff0c\u81ea\u9069\u61c9\u512a\u5316\u5668\u53ef\u4ee5\u6839\u64da\u5df2\u7d93\u8655\u7406\u7684\u6578\u64da\u91cf\u4f86\u8abf\u6574\u5f8c\u7e8c\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-NOiByIElvu\">\u7e3d\u7d50<\/h2>\n<p>Oracle\u6578\u64da\u5eab\u7684\u4e09\u7a2e\u512a\u5316\u5668\u5404\u6709\u5176\u7279\u9ede\u548c\u9069\u7528\u5834\u666f\u3002\u898f\u5247\u57fa\u790e\u512a\u5316\u5668\u9069\u5408\u7c21\u55ae\u67e5\u8a62\uff0c\u6210\u672c\u57fa\u790e\u512a\u5316\u5668\u5247\u5728\u8655\u7406\u8907\u96dc\u67e5\u8a62\u6642\u8868\u73fe\u66f4\u4f73\uff0c\u800c\u81ea\u9069\u61c9\u512a\u5316\u5668\u5247\u80fd\u5728\u57f7\u884c\u904e\u7a0b\u4e2d\u9032\u884c\u52d5\u614b\u8abf\u6574\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002\u4e86\u89e3\u9019\u4e9b\u512a\u5316\u5668\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u66f4\u6709\u6548\u5730\u8a2d\u8a08\u548c\u512a\u5316\u67e5\u8a62\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u696d\u52d9\u4e2d\u4f7f\u7528\u9019\u4e9b\u6280\u8853\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eOracle\u512a\u5316\u5668\u7684\u4e09\u7a2e\u4e0d\u540c\u985e\u578b\uff0c\u4e86\u89e3\u5176\u904b\u4f5c\u539f\u7406\u53ca\u5982\u4f55\u63d0\u5347\u67e5\u8a62\u6548\u80fd\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-191500","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191500","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=191500"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191500\/revisions"}],"predecessor-version":[{"id":191501,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/191500\/revisions\/191501"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=191500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=191500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=191500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}