{"id":93800,"date":"2024-10-19T17:01:16","date_gmt":"2024-10-19T09:01:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93800\/"},"modified":"2024-10-19T17:01:17","modified_gmt":"2024-10-19T09:01:17","slug":"oracle-11g-%e6%96%b0%e7%89%b9%e6%80%a7-%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93800\/","title":{"rendered":"Oracle 11g \u65b0\u7279\u6027&#8211;\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab"},"content":{"rendered":"<h1 id=\"oracle-11g-%e6%96%b0%e7%89%b9%e6%80%a7-%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab-hwWQeLoJAA\">Oracle 11g \u65b0\u7279\u6027&#8211;\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6548\u80fd\u512a\u5316\u4e00\u76f4\u662f\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u95dc\u6ce8\u7684\u91cd\u9ede\u3002Oracle 11g \u5f15\u5165\u4e86\u8a31\u591a\u65b0\u7279\u6027\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\uff08Adaptive Cursor Sharing\uff09\u3002\u9019\u4e00\u7279\u6027\u65e8\u5728\u6539\u5584 SQL \u67e5\u8a62\u7684\u57f7\u884c\u6548\u80fd\uff0c\u7279\u5225\u662f\u5728\u9762\u5c0d\u4e0d\u540c\u7684\u67e5\u8a62\u53c3\u6578\u6642\u3002<\/p>\n<h2 id=\"%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab%e7%9a%84%e8%83%8c%e6%99%af-hwWQeLoJAA\">\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u80cc\u666f<\/h2>\n<p>\u5728\u50b3\u7d71\u7684\u6e38\u6a19\u5171\u4eab\u6a5f\u5236\u4e2d\uff0cOracle \u6703\u6839\u64da SQL \u8a9e\u53e5\u7684\u57f7\u884c\u8a08\u5283\u4f86\u6c7a\u5b9a\u662f\u5426\u5171\u4eab\u6e38\u6a19\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u4e00\u500b SQL \u8a9e\u53e5\u5728\u4e0d\u540c\u7684\u57f7\u884c\u74b0\u5883\u4e0b\uff08\u4f8b\u5982\u4e0d\u540c\u7684\u67e5\u8a62\u53c3\u6578\uff09\u8868\u73fe\u4e0d\u4f73\uff0c\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u51fa\u73fe\uff0c\u6b63\u662f\u70ba\u4e86\u89e3\u6c7a\u9019\u4e00\u554f\u984c\u3002<\/p>\n<h2 id=\"%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-hwWQeLoJAA\">\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u6838\u5fc3\u5728\u65bc\u5b83\u80fd\u5920\u6839\u64da\u57f7\u884c\u6642\u7684\u5be6\u969b\u60c5\u6cc1\u52d5\u614b\u8abf\u6574\u6e38\u6a19\u7684\u4f7f\u7528\u3002\u7576\u4e00\u500b SQL \u8a9e\u53e5\u88ab\u57f7\u884c\u6642\uff0cOracle \u6703\u6839\u64da\u7576\u524d\u7684\u57f7\u884c\u8a08\u5283\u548c\u53c3\u6578\u4f86\u6c7a\u5b9a\u662f\u5426\u4f7f\u7528\u5171\u4eab\u6e38\u6a19\u3002\u5177\u9ad4\u4f86\u8aaa\uff0c\u7576 Oracle \u6aa2\u6e2c\u5230\u67d0\u500b\u6e38\u6a19\u5728\u4e0d\u540c\u7684\u57f7\u884c\u74b0\u5883\u4e0b\u8868\u73fe\u4e0d\u4e00\u81f4\u6642\uff0c\u5b83\u6703\u81ea\u52d5\u5275\u5efa\u4e00\u500b\u65b0\u7684\u6e38\u6a19\u4f86\u8655\u7406\u9019\u4e9b\u7279\u5b9a\u7684\u60c5\u6cc1\u3002<\/p>\n<h3 id=\"%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab%e7%9a%84%e5%84%aa%e5%8b%a2-hwWQeLoJAA\">\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u512a\u52e2<\/h3>\n<ul>\n<li><strong>\u63d0\u9ad8\u6548\u80fd\uff1a<\/strong>\u901a\u904e\u6839\u64da\u5be6\u969b\u57f7\u884c\u60c5\u6cc1\u52d5\u614b\u8abf\u6574\u6e38\u6a19\uff0c\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u80fd\u5920\u986f\u8457\u63d0\u9ad8 SQL \u67e5\u8a62\u7684\u57f7\u884c\u6548\u80fd\u3002<\/li>\n<li><strong>\u6e1b\u5c11\u8cc7\u6e90\u6d88\u8017\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u5171\u4eab\u6e38\u6a19\u53ef\u4ee5\u6e1b\u5c11\u5167\u5b58\u548c CPU \u7684\u4f7f\u7528\uff0c\u5f9e\u800c\u964d\u4f4e\u7cfb\u7d71\u7684\u6574\u9ad4\u8ca0\u64d4\u3002<\/li>\n<li><strong>\u7c21\u5316\u7ba1\u7406\uff1a<\/strong>\u7cfb\u7d71\u7ba1\u7406\u54e1\u4e0d\u518d\u9700\u8981\u624b\u52d5\u8abf\u6574\u6e38\u6a19\u7684\u5171\u4eab\u7b56\u7565\uff0c\u9019\u6e1b\u5c11\u4e86\u7ba1\u7406\u7684\u8907\u96dc\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%95%9f%e7%94%a8%e8%87%aa%e9%81%a9%e6%87%89%e6%b8%b8%e6%a8%99%e5%85%b1%e4%ba%ab-hwWQeLoJAA\">\u5982\u4f55\u555f\u7528\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab<\/h2>\n<p>\u8981\u555f\u7528\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\uff0c\u60a8\u9700\u8981\u5728 Oracle \u8cc7\u6599\u5eab\u4e2d\u8a2d\u7f6e\u76f8\u61c9\u7684\u53c3\u6578\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b SQL \u8a9e\u53e5\u4f86\u6aa2\u67e5\u548c\u8a2d\u7f6e\u8a72\u53c3\u6578\uff1a<\/p>\n<pre><code>-- \u6aa2\u67e5\u7576\u524d\u8a2d\u7f6e\nSHOW PARAMETER cursor_sharing;\n\n-- \u8a2d\u7f6e\u70ba\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\nALTER SYSTEM SET cursor_sharing='ADAPTIVE';<\/code><\/pre>\n<p>\u5728\u8a2d\u7f6e\u5b8c\u6210\u5f8c\uff0c\u60a8\u53ef\u4ee5\u901a\u904e\u67e5\u8a62 V$SQL \u4f86\u6aa2\u67e5\u6e38\u6a19\u7684\u4f7f\u7528\u60c5\u6cc1\uff0c\u5f9e\u800c\u8a55\u4f30\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u7684\u6548\u679c\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%a1%88%e4%be%8b%e5%88%86%e6%9e%90-hwWQeLoJAA\">\u5be6\u969b\u6848\u4f8b\u5206\u6790<\/h2>\n<p>\u5047\u8a2d\u6709\u4e00\u500b\u67e5\u8a62\u8a9e\u53e5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE department_id = :dept_id;<\/code><\/pre>\n<p>\u5728\u4e0d\u540c\u7684\u57f7\u884c\u74b0\u5883\u4e0b\uff0c\u7576 <code>:dept_id<\/code> \u7684\u503c\u70ba 10 \u548c 20 \u6642\uff0cOracle \u53ef\u80fd\u6703\u9078\u64c7\u4e0d\u540c\u7684\u57f7\u884c\u8a08\u5283\u3002\u4f7f\u7528\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u5f8c\uff0cOracle \u5c07\u80fd\u5920\u6839\u64da\u5be6\u969b\u7684\u57f7\u884c\u60c5\u6cc1\u81ea\u52d5\u8abf\u6574\u6e38\u6a19\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-hwWQeLoJAA\">\u7d50\u8ad6<\/h2>\n<p>\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u662f Oracle 11g \u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6027\u80fd\u512a\u5316\u7279\u6027\uff0c\u901a\u904e\u52d5\u614b\u8abf\u6574\u6e38\u6a19\u7684\u4f7f\u7528\uff0c\u80fd\u5920\u986f\u8457\u63d0\u9ad8 SQL \u67e5\u8a62\u7684\u57f7\u884c\u6548\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u67e5\u8a62\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u9019\u4e00\u7279\u6027\u7121\u7591\u662f\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u7684\u6709\u6548\u624b\u6bb5\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u548c\u5176\u4ed6\u4f3a\u670d\u5668\u89e3\u6c7a\u65b9\u6848\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle 11g\u7684\u81ea\u9069\u61c9\u6e38\u6a19\u5171\u4eab\u65b0\u7279\u6027\uff0c\u63d0\u5347\u67e5\u8a62\u6027\u80fd\uff0c\u512a\u5316\u8cc7\u6e90\u4f7f\u7528\uff0c\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\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-93800","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93800","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=93800"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93800\/revisions"}],"predecessor-version":[{"id":93801,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93800\/revisions\/93801"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}