\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u548c\u6027\u80fd\u662f\u6578\u64da\u5eab\u7ba1\u7406\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u6b63\u78ba\u5730\u67e5\u770b\u548c\u5206\u6790SQL\u67e5\u8a62\u4e0d\u50c5\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u63d0\u9ad8\u6574\u9ad4\u7cfb\u7d71\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u5728Oracle\u6578\u64da\u5eab\u4e2d\u67e5\u770bSQL\u7684\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n
EXPLAIN PLAN\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u57f7\u884c\u8a08\u5283\u986f\u793a\u4e86Oracle\u5982\u4f55\u57f7\u884c\u67e5\u8a62\uff0c\u5305\u62ec\u4f7f\u7528\u7684\u7d22\u5f15\u3001\u9023\u63a5\u65b9\u6cd5\u548c\u9810\u671f\u7684\u884c\u6578\u7b49\u4fe1\u606f\u3002<\/p>\n
EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE department_id = 10;\n<\/code><\/pre>\n\u57f7\u884c\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u67e5\u770b\u57f7\u884c\u8a08\u5283\uff1a<\/p>\n
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);\n<\/code><\/pre>\n\u9019\u5c07\u986f\u793a\u51fa\u8a72SQL\u67e5\u8a62\u7684\u8a73\u7d30\u57f7\u884c\u8a08\u5283\uff0c\u5e6b\u52a9\u7528\u6236\u7406\u89e3\u67e5\u8a62\u7684\u6027\u80fd\u74f6\u9838\u3002<\/p>\n
2. \u4f7f\u7528AUTOTRACE<\/h2>\n
AUTOTRACE\u662f\u4e00\u500b\u65b9\u4fbf\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5728SQL*Plus\u4e2d\u555f\u7528\uff0c\u8b93\u7528\u6236\u5728\u57f7\u884c\u67e5\u8a62\u5f8c\u81ea\u52d5\u986f\u793a\u57f7\u884c\u8a08\u5283\u548c\u7d71\u8a08\u4fe1\u606f\u3002\u8981\u555f\u7528AUTOTRACE\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n
SET AUTOTRACE ON;\n<\/code><\/pre>\n\u7136\u5f8c\u57f7\u884c\u4f60\u7684SQL\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM employees WHERE department_id = 10;\n<\/code><\/pre>\n\u57f7\u884c\u5f8c\uff0c\u5c07\u986f\u793a\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u548c\u57f7\u884c\u7d71\u8a08\u4fe1\u606f\uff0c\u5305\u62ec\u908f\u8f2f\u8b80\u53d6\u548c\u7269\u7406\u8b80\u53d6\u7684\u6578\u91cf\u3002<\/p>\n
3. \u4f7f\u7528V$SQL\u8996\u5716<\/h2>\n
V$SQL\u8996\u5716\u63d0\u4f9b\u4e86\u7576\u524d\u57f7\u884c\u7684SQL\u8a9e\u53e5\u7684\u8a73\u7d30\u4fe1\u606f\uff0c\u5305\u62ec\u57f7\u884c\u8a08\u5283\u3001\u57f7\u884c\u6b21\u6578\u548c\u6027\u80fd\u7d71\u8a08\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u67e5\u8a62V$SQL\u4f86\u7372\u53d6\u9019\u4e9b\u4fe1\u606f\uff1a<\/p>\n
SELECT sql_text, executions, buffer_gets, disk_reads\nFROM V$SQL\nWHERE sql_text LIKE '%employees%';\n<\/code><\/pre>\n\u9019\u6a23\u53ef\u4ee5\u627e\u5230\u6240\u6709\u5305\u542b\u201cemployees\u201d\u8868\u7684SQL\u67e5\u8a62\uff0c\u4e26\u67e5\u770b\u5176\u57f7\u884c\u6b21\u6578\u548c\u6027\u80fd\u6307\u6a19\u3002<\/p>\n
4. \u4f7f\u7528SQL Trace\u548cTKPROF<\/h2>\n
SQL Trace\u662f\u4e00\u500b\u5f37\u5927\u7684\u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u6355\u7372SQL\u67e5\u8a62\u7684\u57f7\u884c\u4fe1\u606f\u3002\u555f\u7528SQL Trace\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528TKPROF\u5de5\u5177\u4f86\u683c\u5f0f\u5316\u548c\u5206\u6790\u751f\u6210\u7684\u8ddf\u8e64\u6587\u4ef6\u3002<\/p>\n
\u555f\u7528SQL Trace\u7684\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n
ALTER SESSION SET SQL_TRACE = TRUE;\n<\/code><\/pre>\n\u57f7\u884c\u5b8c\u67e5\u8a62\u5f8c\uff0c\u95dc\u9589\u8ddf\u8e64\uff1a<\/p>\n
ALTER SESSION SET SQL_TRACE = FALSE;\n<\/code><\/pre>\n\u7136\u5f8c\u4f7f\u7528TKPROF\u4f86\u5206\u6790\u751f\u6210\u7684\u8ddf\u8e64\u6587\u4ef6\uff0c\u9019\u5c07\u63d0\u4f9b\u8a73\u7d30\u7684\u57f7\u884c\u6642\u9593\u548c\u8cc7\u6e90\u4f7f\u7528\u60c5\u6cc1\u3002<\/p>\n
5. \u4f7f\u7528Oracle Enterprise Manager<\/h2>\n
Oracle Enterprise Manager\u662f\u4e00\u500b\u5716\u5f62\u5316\u7684\u7ba1\u7406\u5de5\u5177\uff0c\u63d0\u4f9b\u4e86\u76f4\u89c0\u7684\u754c\u9762\u4f86\u67e5\u770bSQL\u67e5\u8a62\u7684\u6027\u80fd\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u8a72\u5de5\u5177\u67e5\u770b\u57f7\u884c\u8a08\u5283\u3001\u6027\u80fd\u7d71\u8a08\u548c\u5176\u4ed6\u76f8\u95dc\u4fe1\u606f\uff0c\u9019\u5c0d\u65bc\u4e0d\u719f\u6089\u547d\u4ee4\u884c\u7684\u7528\u6236\u4f86\u8aaa\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u6b63\u78ba\u5730\u67e5\u770bSQL\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u548c\u6027\u80fd\u662f\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u901a\u904e\u4f7f\u7528EXPLAIN PLAN\u3001AUTOTRACE\u3001V$SQL\u8996\u5716\u3001SQL Trace\u548cTKPROF\uff0c\u4ee5\u53caOracle Enterprise Manager\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u548c\u958b\u767c\u8005\u53ef\u4ee5\u7372\u5f97\u6709\u50f9\u503c\u7684\u6d1e\u5bdf\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u548c\u7cfb\u7d71\u6027\u80fd\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4e86\u89e3\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u6b63\u78ba\u67e5\u770bSQL\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u512a\u5316\u6027\u80fd\uff0c\u78ba\u4fdd\u6e96\u78ba\u6027\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-95998","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95998","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=95998"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95998\/revisions"}],"predecessor-version":[{"id":95999,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95998\/revisions\/95999"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}