{"id":188250,"date":"2024-11-11T21:05:23","date_gmt":"2024-11-11T13:05:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188250\/"},"modified":"2024-11-11T21:05:24","modified_gmt":"2024-11-11T13:05:24","slug":"%e8%ab%87%e8%ab%96%e5%a6%82%e4%bd%95oracle%e5%84%aa%e5%8c%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188250\/","title":{"rendered":"\u8ac7\u8ad6\u5982\u4f55Oracle\u512a\u5316"},"content":{"rendered":"<h1 id=\"%e8%ab%87%e8%ab%96%e5%a6%82%e4%bd%95oracle%e5%84%aa%e5%8c%96-sQLhvDhEPw\">\u8ac7\u8ad6\u5982\u4f55Oracle\u512a\u5316<\/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\u3002Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u5e02\u5834\u4e0a\u6700\u53d7\u6b61\u8fce\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e4b\u4e00\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u512a\u5316\u529f\u80fd\uff0c\u5e6b\u52a9\u7528\u6236\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u6574\u9ad4\u7cfb\u7d71\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u6709\u6548\u7684Oracle\u512a\u5316\u7b56\u7565\uff0c\u5e6b\u52a9\u7528\u6236\u5145\u5206\u767c\u63ee\u5176\u6578\u64da\u5eab\u7684\u6f5b\u529b\u3002<\/p>\n<h2 id=\"1-%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-sQLhvDhEPw\">1. \u67e5\u8a62\u512a\u5316<\/h2>\n<p>\u67e5\u8a62\u512a\u5316\u662f\u63d0\u5347Oracle\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u4f7f\u7528\u8005\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u5f0f\u4f86\u512a\u5316\u67e5\u8a62\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u78ba\u4fdd\u5728\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u7279\u5225\u662f\u4e3b\u9375\u548c\u5916\u9375\u3002<\/li>\n<li><strong>\u907f\u514dSELECT *\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u50b3\u8f38\u3002<\/li>\n<li><strong>\u4f7f\u7528EXPLAIN PLAN\uff1a<\/strong>\u4f7f\u7528EXPLAIN PLAN\u547d\u4ee4\u4f86\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u627e\u51fa\u6f5b\u5728\u7684\u6027\u80fd\u74f6\u9838\u3002<\/li>\n<\/ul>\n<pre><code>EXPLAIN PLAN FOR\nSELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n<h2 id=\"2-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a8%ad%e8%a8%88-sQLhvDhEPw\">2. \u6578\u64da\u5eab\u8a2d\u8a08<\/h2>\n<p>\u826f\u597d\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u662f\u512a\u5316\u7684\u57fa\u790e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u8a2d\u8a08\u4e0a\u7684\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li><strong>\u6b63\u898f\u5316\uff1a<\/strong>\u901a\u904e\u6b63\u898f\u5316\u4f86\u6d88\u9664\u6578\u64da\u5197\u9918\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u5206\u5340\u8868\uff1a<\/strong>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u8003\u616e\u4f7f\u7528\u5206\u5340\u8868\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u7ba1\u7406\u6548\u7387\u3002<\/li>\n<li><strong>\u9069\u7576\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong>\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u53ef\u4ee5\u6e1b\u5c11\u5b58\u5132\u7a7a\u9593\u4e26\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e7%b3%bb%e7%b5%b1%e9%85%8d%e7%bd%ae-sQLhvDhEPw\">3. \u7cfb\u7d71\u914d\u7f6e<\/h2>\n<p>\u7cfb\u7d71\u914d\u7f6e\u5c0d\u65bcOracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u4e5f\u6709\u91cd\u8981\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u8abf\u6574\u5167\u5b58\u53c3\u6578\uff1a<\/strong>\u6839\u64da\u61c9\u7528\u9700\u6c42\u8abf\u6574SGA\uff08System Global Area\uff09\u548cPGA\uff08Program Global Area\uff09\u7684\u5927\u5c0f\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u6709\u8db3\u5920\u7684\u5167\u5b58\u4f86\u8655\u7406\u8acb\u6c42\u3002<\/li>\n<li><strong>\u4f7f\u7528\u81ea\u52d5\u5167\u5b58\u7ba1\u7406\uff1a<\/strong>\u555f\u7528\u81ea\u52d5\u5167\u5b58\u7ba1\u7406\uff08AMM\uff09\u529f\u80fd\uff0c\u8b93Oracle\u81ea\u52d5\u8abf\u6574\u5167\u5b58\u5206\u914d\u3002<\/li>\n<li><strong>\u5b9a\u671f\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff1a<\/strong>\u4f7f\u7528DBMS_STATS\u5305\u5b9a\u671f\u66f4\u65b0\u8868\u548c\u7d22\u5f15\u7684\u7d71\u8a08\u4fe1\u606f\uff0c\u4ee5\u5e6b\u52a9\u512a\u5316\u5668\u751f\u6210\u66f4\u597d\u7684\u57f7\u884c\u8a08\u5283\u3002<\/li>\n<\/ul>\n<pre><code>EXEC DBMS_STATS.GATHER_TABLE_STATS('schema_name', 'table_name');<\/code><\/pre>\n<h2 id=\"4-%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e8%a9%a6-sQLhvDhEPw\">4. \u76e3\u63a7\u548c\u8abf\u8a66<\/h2>\n<p>\u6301\u7e8c\u76e3\u63a7\u6578\u64da\u5eab\u6027\u80fd\u662f\u78ba\u4fdd\u5176\u9ad8\u6548\u904b\u884c\u7684\u95dc\u9375\u3002\u4f7f\u7528Oracle\u63d0\u4f9b\u7684\u5de5\u5177\uff0c\u5982AWR\uff08Automatic Workload Repository\uff09\u5831\u544a\u548cASH\uff08Active Session History\uff09\u5831\u544a\uff0c\u4f86\u5206\u6790\u6027\u80fd\u554f\u984c\u3002<\/p>\n<ul>\n<li><strong>AWR\u5831\u544a\uff1a<\/strong>\u63d0\u4f9b\u4e86\u7cfb\u7d71\u6027\u80fd\u7684\u8a73\u7d30\u5feb\u7167\uff0c\u5e6b\u52a9\u8b58\u5225\u74f6\u9838\u3002<\/li>\n<li><strong>ASH\u5831\u544a\uff1a<\/strong>\u63d0\u4f9b\u4e86\u6d3b\u8e8d\u6703\u8a71\u7684\u6b77\u53f2\u6578\u64da\uff0c\u5e6b\u52a9\u5206\u6790\u7576\u524d\u7684\u6027\u80fd\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-sQLhvDhEPw\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u5be6\u65bd\u4e0a\u8ff0Oracle\u512a\u5316\u7b56\u7565\uff0c\u4f01\u696d\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u5176\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6548\u7387\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u512a\u5316\u3001\u6578\u64da\u5eab\u8a2d\u8a08\u3001\u7cfb\u7d71\u914d\u7f6e\u9084\u662f\u6301\u7e8c\u76e3\u63a7\uff0c\u9019\u4e9b\u90fd\u662f\u78ba\u4fddOracle\u6578\u64da\u5eab\u9ad8\u6548\u904b\u884c\u7684\u95dc\u9375\u56e0\u7d20\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u512a\u5316\u7684\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\uff0c\u6e1b\u5c11\u67e5\u8a62\u6642\u9593\uff0c\u78ba\u4fdd\u7cfb\u7d71\u9ad8\u6548\u904b\u884c\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-188250","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188250","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=188250"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188250\/revisions"}],"predecessor-version":[{"id":188251,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188250\/revisions\/188251"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}