{"id":1694,"date":"2015-07-20T21:34:38","date_gmt":"2015-07-21T00:34:38","guid":{"rendered":"http:\/\/www.dbarj.com.br\/?p=1694"},"modified":"2015-07-20T22:32:27","modified_gmt":"2015-07-21T01:32:27","slug":"ocm-11g-preparation-use-sql-plan-management-feature","status":"publish","type":"post","link":"https:\/\/www.dbarj.com.br\/en\/2015\/07\/ocm-11g-preparation-use-sql-plan-management-feature\/","title":{"rendered":"OCM 11g Preparation &#8211; Use SQL Plan Management feature"},"content":{"rendered":"<p>SQL Plan Management is a new feature introduced with Oracle DB\u00a011g that enables the\u00a0system to automatically control SQL plan evolution by maintaining SQL plan baselines. With this enabled, a newly generated SQL plan can integrate a SQL plan baseline only if it has been proven that doing so will not result in performance regression. During execution of a SQL statement,\u00a0only a plan that is part of the corresponding SQL plan baseline can be used.<\/p>\n<p>So this feature is <strong>new<\/strong> and <strong>very useful<\/strong> when you upgrade your Oracle version as you can guarantee that no performance regression will ever happen.<\/p>\n<p>What you need to practice here is:<\/p>\n<ul>\n<li>How to enable this feature.<\/li>\n<li>How to accept\/enable\/fix a plan.<\/li>\n<li>How to use DBMS_SPM and EM to manage it.<\/li>\n<li>Evolving a plan from history to baseline.<\/li>\n<li>Querying the dictionary views (specially\u00a0dba_sql_plan_baselines).<\/li>\n<li>Display the plan using\u00a0DBMS_XPLAN.DISPLAY_SQL_PLAN_BASELINE.<\/li>\n<li>Using SQL Tuning and SQL Tuning Sets with Baseline Plans<\/li>\n<li>Configure Plan retention and space in SYSAUX that it&#8217;s allowed to use.<\/li>\n<\/ul>\n<p>Enterprise Manager is the best for that. Doing everything described here in CLI mode is hard, but not impossible. So use GUI whenever possible for this topic.<\/p>\n<p><strong>Path to Documentation<\/strong>:<\/p>\n<p><span style=\"color: #800000;\">Performance Tuning Guide -> 15 Using SQL Plan Management<\/span><\/p>\n<br>\r\nClick here to go back to the <a title=\"OCM 11g Preparation\" href=\"\/?page_id=923\">Main OCM 11g Preparation<\/a> page.\r\n<br><br>\r\nHave you enjoyed? Please leave a comment or give a \ud83d\udc4d!\n<div class='watch-action'><div class='watch-position align-left'><div class='action-like'><a class='lbg-style2 like-1694 jlk' href='javascript:void(0)' data-task='like' data-post_id='1694' data-nonce='de4404f630' rel='nofollow'><img class='wti-pixel' src='https:\/\/www.dbarj.com.br\/wp-content\/plugins\/wti-like-post\/images\/pixel.gif' title='Like' \/><span class='lc-1694 lc'>+1<\/span><\/a><\/div><\/div> <div class='status-1694 status align-left'><\/div><\/div><div class='wti-clear'><\/div>","protected":false},"excerpt":{"rendered":"<p>SQL Plan Management is a new feature introduced with Oracle DB\u00a011g that enables the\u00a0system to automatically control SQL plan evolution by maintaining SQL plan baselines. With this enabled, a newly generated SQL plan can integrate a SQL plan baseline only if it has been proven that doing so will not result in performance regression. During &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/www.dbarj.com.br\/en\/2015\/07\/ocm-11g-preparation-use-sql-plan-management-feature\/\">Continue reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-1694","post","type-post","status-publish","format-standard","hentry","category-ocm11g-en","item-wrap"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>OCM 11g Preparation - Use SQL Plan Management feature - DBA - Rodrigo Jorge - Oracle Tips and Guides<\/title>\n<meta name=\"description\" content=\"Use SQL Plan Management feature for Oracle OCM 11g Certification\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbarj.com.br\/en\/2015\/07\/ocm-11g-preparation-use-sql-plan-management-feature\/\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"DBA RJ\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/07\\\/ocm-11g-preparation-use-sql-plan-management-feature\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/07\\\/ocm-11g-preparation-use-sql-plan-management-feature\\\/\"},\"author\":{\"name\":\"DBA RJ\",\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/#\\\/schema\\\/person\\\/28a44ca3a6633fe4156ad1ea209d40a9\"},\"headline\":\"OCM 11g Preparation &#8211; 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