{"id":95552,"date":"2024-10-20T02:00:22","date_gmt":"2024-10-19T18:00:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95552\/"},"modified":"2024-10-20T02:00:22","modified_gmt":"2024-10-19T18:00:22","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e7%9c%8bsql%e5%a6%82%e4%bd%95%e6%ad%a3%e5%b8%b8%e9%81%8b%e8%a1%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95552\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u67e5\u770bSQL\u5982\u4f55\u6b63\u5e38\u904b\u884c\uff1f"},"content":{"rendered":"

Oracle\u6578\u64da\u5eab\u67e5\u770bSQL\u5982\u4f55\u6b63\u5e38\u904b\u884c\uff1f<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cOracle\u6578\u64da\u5eab\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u6578\u64da\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u4f01\u696d\u548c\u7d44\u7e54\u4e2d\u3002\u4e86\u89e3\u5982\u4f55\u67e5\u770b\u548c\u78ba\u4fddSQL\u67e5\u8a62\u7684\u6b63\u5e38\u904b\u884c\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u60c5\u6cc1\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n

1. \u4f7f\u7528SQL*Plus\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u72c0\u614b<\/h2>\n

SQL*Plus\u662fOracle\u63d0\u4f9b\u7684\u4e00\u500b\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u5141\u8a31\u7528\u6236\u57f7\u884cSQL\u67e5\u8a62\u4e26\u67e5\u770b\u7d50\u679c\u3002\u8981\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u72c0\u614b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9a5f\uff1a<\/p>\n

sqlplus username\/password@database\n<\/code><\/pre>\n
\u9023\u63a5\u5230\u6578\u64da\u5eab\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u67e5\u770b\u7576\u524d\u57f7\u884c\u7684SQL\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM v$session WHERE status = 'ACTIVE';\n<\/code><\/pre>\n
\u9019\u5c07\u986f\u793a\u7576\u524d\u6d3b\u8e8d\u7684\u6703\u8a71\uff0c\u5305\u62ec\u57f7\u884c\u7684SQL\u67e5\u8a62\u3002<\/p>\n
2. \u4f7f\u7528V$SQL\u8996\u5716\u67e5\u770bSQL\u67e5\u8a62\u7684\u6027\u80fd<\/h2>\n
Oracle\u63d0\u4f9b\u4e86V$SQL\u8996\u5716\uff0c\u8a72\u8996\u5716\u5305\u542b\u4e86\u6240\u6709\u5df2\u7d93\u89e3\u6790\u7684SQL\u8a9e\u53e5\u7684\u4fe1\u606f\u3002\u901a\u904e\u67e5\u8a62\u9019\u500b\u8996\u5716\uff0c\u53ef\u4ee5\u7372\u5f97SQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u548c\u6027\u80fd\u7d71\u8a08\u4fe1\u606f\u3002<\/p>\n
SELECT sql_text, executions, elapsed_time, cpu_time\nFROM v$sql\nWHERE sql_text LIKE '%your_query%';\n<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0c\u5c07\u201cyour_query\u201d\u66ff\u63db\u70ba\u60a8\u60f3\u8981\u67e5\u770b\u7684SQL\u67e5\u8a62\u7684\u4e00\u90e8\u5206\u3002\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u60a8\u4e86\u89e3\u8a72\u67e5\u8a62\u7684\u57f7\u884c\u6b21\u6578\u3001\u7e3d\u8017\u6642\u548cCPU\u6642\u9593\u3002<\/p>\n
3. \u4f7f\u7528EXPLAIN PLAN\u5206\u6790SQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283<\/h2>\n
\u8981\u78ba\u4fddSQL\u67e5\u8a62\u7684\u6b63\u5e38\u904b\u884c\uff0c\u5206\u6790\u5176\u57f7\u884c\u8a08\u5283\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f7f\u7528EXPLAIN PLAN\u547d\u4ee4\u53ef\u4ee5\u7372\u5f97SQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5e6b\u52a9\u60a8\u4e86\u89e3\u6578\u64da\u5eab\u5982\u4f55\u57f7\u884c\u8a72\u67e5\u8a62\u3002<\/p>\n
EXPLAIN PLAN FOR\nSELECT * FROM your_table WHERE your_condition;\n<\/code><\/pre>\n
\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u67e5\u770b\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n
SELECT * FROM table(dbms_xplan.display);\n<\/code><\/pre>\n
\u9019\u5c07\u986f\u793a\u8a72\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u5305\u62ec\u8a2a\u554f\u8def\u5f91\u548c\u6210\u672c\u4f30\u7b97\u3002<\/p>\n
4. \u4f7f\u7528AWR\u5831\u544a\u9032\u884c\u6027\u80fd\u5206\u6790<\/h2>\n
Oracle\u7684\u81ea\u52d5\u5de5\u4f5c\u8ca0\u8f09\u5831\u544a\uff08AWR\uff09\u63d0\u4f9b\u4e86\u6709\u95dc\u6578\u64da\u5eab\u6027\u80fd\u7684\u8a73\u7d30\u4fe1\u606f\u3002\u901a\u904e\u751f\u6210AWR\u5831\u544a\uff0c\u60a8\u53ef\u4ee5\u7372\u5f97\u6709\u95dcSQL\u67e5\u8a62\u6027\u80fd\u7684\u6df1\u5165\u898b\u89e3\u3002<\/p>\n
EXEC dbms_workload_repository.create_snapshot;\n<\/code><\/pre>\n
\u7136\u5f8c\uff0c\u60a8\u53ef\u4ee5\u751f\u6210\u5831\u544a\u4f86\u5206\u6790\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u5167\u7684\u6027\u80fd\u6578\u64da\u3002\u9019\u5c0d\u65bc\u8b58\u5225\u6027\u80fd\u74f6\u9838\u548c\u512a\u5316\u67e5\u8a62\u975e\u5e38\u6709\u5e6b\u52a9\u3002<\/p>\n
5. \u76e3\u63a7SQL\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593<\/h2>\n
\u70ba\u4e86\u78ba\u4fddSQL\u67e5\u8a62\u7684\u6b63\u5e38\u904b\u884c\uff0c\u76e3\u63a7\u5176\u57f7\u884c\u6642\u9593\u662f\u5fc5\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u6700\u8fd1\u57f7\u884c\u7684SQL\u67e5\u8a62\u53ca\u5176\u57f7\u884c\u6642\u9593\uff1a<\/p>\n
SELECT sql_id, elapsed_time, cpu_time, executions\nFROM v$sql\nORDER BY elapsed_time DESC\nFETCH FIRST 10 ROWS ONLY;\n<\/code><\/pre>\n
\u9019\u5c07\u986f\u793a\u57f7\u884c\u6642\u9593\u6700\u9577\u7684\u524d\u5341\u500bSQL\u67e5\u8a62\uff0c\u5e6b\u52a9\u60a8\u8b58\u5225\u9700\u8981\u512a\u5316\u7684\u67e5\u8a62\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Oracle\u6578\u64da\u5eab\u4e2d\u67e5\u770bSQL\u67e5\u8a62\u7684\u6b63\u5e38\u904b\u884c\u6d89\u53ca\u591a\u500b\u65b9\u9762\uff0c\u5305\u62ec\u4f7f\u7528SQL*Plus\u3001V$SQL\u8996\u5716\u3001EXPLAIN PLAN\u3001AWR\u5831\u544a\u4ee5\u53ca\u76e3\u63a7\u57f7\u884c\u6642\u9593\u7b49\u65b9\u6cd5\u3002\u9019\u4e9b\u5de5\u5177\u548c\u6280\u8853\u53ef\u4ee5\u5e6b\u52a9\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u78ba\u4fddSQL\u67e5\u8a62\u7684\u6027\u80fd\u548c\u6548\u7387\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u7684\u652f\u6301\u6216\u5c0b\u627e\u5408\u9069\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u67e5\u770bSQL\u67e5\u8a62\u7684\u904b\u884c\u72c0\u614b\uff0c\u78ba\u4fdd\u5176\u6b63\u5e38\u57f7\u884c\u4e26\u512a\u5316\u6027\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-95552","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95552","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=95552"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95552\/revisions"}],"predecessor-version":[{"id":95553,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95552\/revisions\/95553"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95552"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}