{"id":181310,"date":"2024-11-09T15:59:21","date_gmt":"2024-11-09T07:59:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/181310\/"},"modified":"2024-11-09T15:59:21","modified_gmt":"2024-11-09T07:59:21","slug":"%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e8%99%95%e7%90%86%e6%80%9d%e8%b7%af%ef%bc%8c%e6%8f%ad%e7%a4%ba%e9%ab%98%e6%95%88%e5%84%aa%e5%8c%96%e6%8a%80%e5%b7%a7%ef%bc%88oracl","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/181310\/","title":{"rendered":"\u6df1\u5165\u5256\u6790Oracle\u6578\u64da\u5eab\u8655\u7406\u601d\u8def\uff0c\u63ed\u793a\u9ad8\u6548\u512a\u5316\u6280\u5de7\uff08oracle\u6578\u64da\u5eab\u8655\u7406\u601d\u8def\uff09"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e5%89%96%e6%9e%90oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e8%99%95%e7%90%86%e6%80%9d%e8%b7%af%ef%bc%8c%e6%8f%ad%e7%a4%ba%e9%ab%98%e6%95%88%e5%84%aa%e5%8c%96%e6%8a%80%e5%b7%a7-xowkRiQMmr\">\u6df1\u5165\u5256\u6790Oracle\u6578\u64da\u5eab\u8655\u7406\u601d\u8def\uff0c\u63ed\u793a\u9ad8\u6548\u512a\u5316\u6280\u5de7<\/h1>\n<p>Oracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u4f01\u696d\u7d1a\u61c9\u7528\u4e2d\u3002\u5176\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u548c\u9748\u6d3b\u7684\u67b6\u69cb\u8a2d\u8a08\uff0c\u4f7f\u5f97Oracle\u6210\u70ba\u8a31\u591a\u4f01\u696d\u7684\u9996\u9078\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u5982\u4f55\u9ad8\u6548\u5730\u512a\u5316Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u6210\u70ba\u4e86\u8a31\u591aDBA\uff08\u6578\u64da\u5eab\u7ba1\u7406\u54e1\uff09\u9762\u81e8\u7684\u91cd\u8981\u6311\u6230\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u7684\u8655\u7406\u601d\u8def\uff0c\u4e26\u63ed\u793a\u4e00\u4e9b\u9ad8\u6548\u7684\u512a\u5316\u6280\u5de7\u3002<\/p>\n<h2 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%9e%b6%e6%a7%8b-xowkRiQMmr\">Oracle\u6578\u64da\u5eab\u7684\u57fa\u672c\u67b6\u69cb<\/h2>\n<p>\u5728\u6df1\u5165\u512a\u5316\u4e4b\u524d\uff0c\u4e86\u89e3Oracle\u6578\u64da\u5eab\u7684\u57fa\u672c\u67b6\u69cb\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002Oracle\u6578\u64da\u5eab\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5eab\u5be6\u4f8b\uff1a<\/strong>\u5305\u62ec\u5167\u5b58\u7d50\u69cb\u548c\u80cc\u666f\u9032\u7a0b\uff0c\u8ca0\u8cac\u6578\u64da\u7684\u8b80\u53d6\u548c\u5beb\u5165\u3002<\/li>\n<li><strong>\u6578\u64da\u6587\u4ef6\uff1a<\/strong>\u5b58\u5132\u5be6\u969b\u7684\u6578\u64da\uff0c\u901a\u5e38\u4ee5\u8868\u7a7a\u9593\u7684\u5f62\u5f0f\u7d44\u7e54\u3002<\/li>\n<li><strong>\u63a7\u5236\u6587\u4ef6\uff1a<\/strong>\u8a18\u9304\u6578\u64da\u5eab\u7684\u7d50\u69cb\u548c\u72c0\u614b\u4fe1\u606f\u3002<\/li>\n<li><strong>\u91cd\u505a\u65e5\u8a8c\uff1a<\/strong>\u7528\u65bc\u6578\u64da\u6062\u5fa9\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%e7%9a%84%e6%80%9d%e8%b7%af-xowkRiQMmr\">\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u601d\u8def<\/h2>\n<p>\u5728\u9032\u884c\u6027\u80fd\u512a\u5316\u6642\uff0c\u9996\u5148\u9700\u8981\u78ba\u5b9a\u6027\u80fd\u74f6\u9838\u3002\u5e38\u898b\u7684\u6027\u80fd\u74f6\u9838\u5305\u62ecCPU\u3001\u5167\u5b58\u3001I\/O\u548c\u7db2\u7d61\u7b49\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u7684\u601d\u8def\uff1a<\/p>\n<h3 id=\"1-%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96-xowkRiQMmr\">1. \u67e5\u8a62\u512a\u5316<\/h3>\n<p>\u67e5\u8a62\u6027\u80fd\u662f\u5f71\u97ff\u6574\u9ad4\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u56e0\u7d20\u4e4b\u4e00\u3002\u4f7f\u7528EXPLAIN PLAN\u547d\u4ee4\u53ef\u4ee5\u5206\u6790SQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5f9e\u800c\u627e\u51fa\u6f5b\u5728\u7684\u6027\u80fd\u554f\u984c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR \nSELECT * FROM employees WHERE department_id = 10;<\/code><\/pre>\n<p>\u901a\u904e\u5206\u6790\u57f7\u884c\u8a08\u5283\uff0c\u53ef\u4ee5\u767c\u73fe\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\uff0c\u662f\u5426\u5b58\u5728\u5168\u8868\u6383\u63cf\u7b49\u554f\u984c\u3002\u91dd\u5c0d\u67e5\u8a62\u9032\u884c\u512a\u5316\uff0c\u4f8b\u5982\u6dfb\u52a0\u5408\u9069\u7684\u7d22\u5f15\u3001\u91cd\u5bebSQL\u8a9e\u53e5\u7b49\uff0c\u80fd\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h3 id=\"2-%e7%b4%a2%e5%bc%95%e7%ae%a1%e7%90%86-xowkRiQMmr\">2. \u7d22\u5f15\u7ba1\u7406<\/h3>\n<p>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u624b\u6bb5\uff0c\u4f46\u904e\u591a\u6216\u4e0d\u7576\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u5beb\u5165\u6027\u80fd\u3002\u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u5efa\u7d22\u5f15\u662f\u5fc5\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u67e5\u770b\u7d22\u5f15\u7684\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>SELECT index_name, \n       table_name, \n       num_rows \nFROM user_indexes;<\/code><\/pre>\n<p>\u6839\u64da\u67e5\u8a62\u7684\u5be6\u969b\u60c5\u6cc1\uff0c\u9069\u6642\u6dfb\u52a0\u6216\u522a\u9664\u7d22\u5f15\uff0c\u4ee5\u9054\u5230\u6700\u4f73\u6027\u80fd\u3002<\/p>\n<h3 id=\"3-%e5%85%a7%e5%ad%98%e7%ae%a1%e7%90%86-xowkRiQMmr\">3. \u5167\u5b58\u7ba1\u7406<\/h3>\n<p>Oracle\u6578\u64da\u5eab\u7684\u5167\u5b58\u7ba1\u7406\u5c0d\u6027\u80fd\u5f71\u97ff\u6df1\u9060\u3002\u5408\u7406\u914d\u7f6eSGA\uff08\u7cfb\u7d71\u5168\u5c40\u5340\uff09\u548cPGA\uff08\u7a0b\u5e8f\u5168\u5c40\u5340\uff09\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u97ff\u61c9\u901f\u5ea6\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u7576\u524d\u7684\u5167\u5b58\u914d\u7f6e\uff1a<\/p>\n<pre><code>SHOW PARAMETER memory;<\/code><\/pre>\n<p>\u6839\u64da\u5be6\u969b\u9700\u6c42\u8abf\u6574\u5167\u5b58\u53c3\u6578\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u80fd\u5920\u5145\u5206\u5229\u7528\u53ef\u7528\u8cc7\u6e90\u3002<\/p>\n<h3 id=\"4-i-o%e5%84%aa%e5%8c%96-xowkRiQMmr\">4. I\/O\u512a\u5316<\/h3>\n<p>I\/O\u6027\u80fd\u76f4\u63a5\u5f71\u97ff\u6578\u64da\u5eab\u7684\u6574\u9ad4\u6027\u80fd\u3002\u4f7f\u7528ASM\uff08\u81ea\u52d5\u5b58\u5132\u7ba1\u7406\uff09\u53ef\u4ee5\u63d0\u9ad8I\/O\u6027\u80fd\uff0c\u4e26\u7c21\u5316\u5b58\u5132\u7ba1\u7406\u3002\u6b64\u5916\uff0c\u5b9a\u671f\u6aa2\u67e5\u78c1\u789f\u7684\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u6587\u4ef6\u7684\u5206\u4f48\u5408\u7406\uff0c\u907f\u514dI\/O\u74f6\u9838\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-xowkRiQMmr\">\u7d50\u8ad6<\/h2>\n<p>\u512a\u5316Oracle\u6578\u64da\u5eab\u7684\u6027\u80fd\u662f\u4e00\u500b\u6301\u7e8c\u7684\u904e\u7a0b\uff0c\u9700\u8981\u6839\u64da\u5be6\u969b\u60c5\u6cc1\u4e0d\u65b7\u8abf\u6574\u548c\u6539\u9032\u3002\u901a\u904e\u67e5\u8a62\u512a\u5316\u3001\u7d22\u5f15\u7ba1\u7406\u3001\u5167\u5b58\u7ba1\u7406\u548cI\/O\u512a\u5316\u7b49\u624b\u6bb5\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\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\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u5256\u6790Oracle\u6578\u64da\u5eab\u8655\u7406\u601d\u8def\uff0c\u63ed\u793a\u9ad8\u6548\u512a\u5316\u6280\u5de7\uff0c\u52a9\u60a8\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\u7ba1\u7406\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-181310","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181310","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=181310"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181310\/revisions"}],"predecessor-version":[{"id":181311,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/181310\/revisions\/181311"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=181310"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=181310"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=181310"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}