{"id":189306,"date":"2024-11-12T06:32:20","date_gmt":"2024-11-11T22:32:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189306\/"},"modified":"2024-11-12T06:32:21","modified_gmt":"2024-11-11T22:32:21","slug":"%e9%80%9a%e9%81%8e%e8%aa%bf%e7%af%80%e7%b4%a2%e5%bc%95-%e5%84%aa%e5%8c%96oracle%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189306\/","title":{"rendered":"\u901a\u904e\u8abf\u7bc0\u7d22\u5f15 \u512a\u5316Oracle\u95dc\u806f\u67e5\u8a62\u6027\u80fd"},"content":{"rendered":"<h1 id=\"%e9%80%9a%e9%81%8e%e8%aa%bf%e7%af%80%e7%b4%a2%e5%bc%95-%e5%84%aa%e5%8c%96oracle%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-YGXPIKBbap\">\u901a\u904e\u8abf\u7bc0\u7d22\u5f15 \u512a\u5316Oracle\u95dc\u806f\u67e5\u8a62\u6027\u80fd<\/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\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u884c\u696d\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u67e5\u8a62\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u901a\u904e\u8abf\u7bc0\u7d22\u5f15\u4f86\u512a\u5316Oracle\u7684\u95dc\u806f\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b4%a2%e5%bc%95%ef%bc%9f-YGXPIKBbap\">\u4ec0\u9ebc\u662f\u7d22\u5f15\uff1f<\/h2>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u901f\u5ea6\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002Oracle\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ecB\u6a39\u7d22\u5f15\u3001\u4f4d\u5716\u7d22\u5f15\u548c\u53cd\u5411\u7d22\u5f15\u7b49\u3002\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u985e\u578b\u5c0d\u65bc\u67e5\u8a62\u6027\u80fd\u7684\u63d0\u5347\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e9%a1%9e%e5%9e%8b-YGXPIKBbap\">\u7d22\u5f15\u7684\u985e\u578b<\/h2>\n<ul>\n<li><strong>B\u6a39\u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u985e\u578b\uff0c\u9069\u5408\u65bc\u9ad8\u57fa\u6578\u7684\u5217\u3002<\/li>\n<li><strong>\u4f4d\u5716\u7d22\u5f15\uff1a<\/strong>\u9069\u5408\u65bc\u4f4e\u57fa\u6578\u7684\u5217\uff0c\u80fd\u5920\u6709\u6548\u5730\u58d3\u7e2e\u6578\u64da\u3002<\/li>\n<li><strong>\u53cd\u5411\u7d22\u5f15\uff1a<\/strong>\u4e3b\u8981\u7528\u65bc\u8655\u7406\u5927\u91cf\u7684\u6587\u672c\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e9%80%9a%e9%81%8e%e8%aa%bf%e7%af%80%e7%b4%a2%e5%bc%95%e4%be%86%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-YGXPIKBbap\">\u5982\u4f55\u901a\u904e\u8abf\u7bc0\u7d22\u5f15\u4f86\u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h2>\n<h3 id=\"1-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e8%a8%88%e5%8a%83-YGXPIKBbap\">1. \u5206\u6790\u67e5\u8a62\u8a08\u5283<\/h3>\n<p>\u5728\u512a\u5316\u67e5\u8a62\u6027\u80fd\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5206\u6790\u67e5\u8a62\u8a08\u5283\u3002\u4f7f\u7528Oracle\u7684EXPLAIN PLAN\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u4e86\u89e3\u6578\u64da\u5eab\u5982\u4f55\u8a2a\u554f\u6578\u64da\u3002\u9019\u6709\u52a9\u65bc\u8b58\u5225\u662f\u5426\u9700\u8981\u6dfb\u52a0\u6216\u8abf\u6574\u7d22\u5f15\u3002<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e5%90%88%e9%81%a9%e7%9a%84%e7%b4%a2%e5%bc%95-YGXPIKBbap\">2. \u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15<\/h3>\n<p>\u6839\u64da\u67e5\u8a62\u8a08\u5283\u7684\u5206\u6790\u7d50\u679c\uff0c\u5275\u5efa\u5408\u9069\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5982\u679c\u67e5\u8a62\u7d93\u5e38\u4f7f\u7528\u67d0\u500b\u5217\u9032\u884c\u904e\u6ffe\uff0c\u5247\u53ef\u4ee5\u5728\u8a72\u5217\u4e0a\u5275\u5efaB\u6a39\u7d22\u5f15\u3002<\/p>\n<pre><code>CREATE INDEX idx_department ON employees(department_id);<\/code><\/pre>\n<h3 id=\"3-%e5%ae%9a%e6%9c%9f%e9%87%8d%e5%bb%ba%e7%b4%a2%e5%bc%95-YGXPIKBbap\">3. \u5b9a\u671f\u91cd\u5efa\u7d22\u5f15<\/h3>\n<p>\u96a8\u8457\u6578\u64da\u7684\u589e\u9577\u548c\u8b8a\u66f4\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u518d\u9ad8\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u91cd\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>ALTER INDEX idx_department REBUILD;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e7%b5%84%e5%90%88%e7%b4%a2%e5%bc%95-YGXPIKBbap\">4. \u4f7f\u7528\u7d44\u5408\u7d22\u5f15<\/h3>\n<p>\u5c0d\u65bc\u7d93\u5e38\u4e00\u8d77\u4f7f\u7528\u7684\u591a\u500b\u5217\uff0c\u53ef\u4ee5\u8003\u616e\u5275\u5efa\u7d44\u5408\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u67e5\u8a62\u6642\u7684I\/O\u64cd\u4f5c\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<pre><code>CREATE INDEX idx_emp_dept ON employees(department_id, job_id);<\/code><\/pre>\n<h3 id=\"5-%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e6%95%b4-YGXPIKBbap\">5. \u76e3\u63a7\u548c\u8abf\u6574<\/h3>\n<p>\u512a\u5316\u7d22\u5f15\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\u3002\u4f7f\u7528Oracle\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5982AWR\u5831\u544a\uff0c\u5b9a\u671f\u6aa2\u67e5\u67e5\u8a62\u6027\u80fd\uff0c\u4e26\u6839\u64da\u9700\u8981\u8abf\u6574\u7d22\u5f15\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-YGXPIKBbap\">\u7d50\u8ad6<\/h2>\n<p>\u901a\u904e\u5408\u7406\u7684\u7d22\u5f15\u7ba1\u7406\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8Oracle\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6027\u80fd\u3002\u5f9e\u5206\u6790\u67e5\u8a62\u8a08\u5283\u5230\u5275\u5efa\u548c\u8abf\u6574\u7d22\u5f15\uff0c\u6bcf\u4e00\u6b65\u90fd\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u6301\u7e8c\u7684\u76e3\u63a7\u548c\u8abf\u6574\u5c07\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u4ee5\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u904b\u884c\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\u5c07\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u901a\u904e\u8abf\u7bc0\u7d22\u5f15\uff0c\u63d0\u5347Oracle\u95dc\u806f\u67e5\u8a62\u6027\u80fd\uff0c\u5be6\u73fe\u66f4\u5feb\u7684\u6578\u64da\u6aa2\u7d22\u548c\u66f4\u9ad8\u7684\u7cfb\u7d71\u6548\u7387\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-189306","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189306","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=189306"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189306\/revisions"}],"predecessor-version":[{"id":189307,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/189306\/revisions\/189307"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=189306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=189306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=189306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}