{"id":15498,"date":"2024-03-15T11:16:05","date_gmt":"2024-03-15T11:16:05","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-should-the-flashback-area-size-be-configured-for-oracle\/"},"modified":"2025-08-06T19:07:23","modified_gmt":"2025-08-06T19:07:23","slug":"how-should-the-flashback-area-size-be-configured-for-oracle","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-should-the-flashback-area-size-be-configured-for-oracle\/","title":{"rendered":"How should the flashback area size be configured for Or…"},"content":{"rendered":"

The flashback area size in Oracle is determined by the parameter undo_retention.<\/p>\n

The undo_retention parameter specifies the longest retention time of transactions in an Oracle database, which is the size of the flashback area. By default, the value of the undo_retention parameter is 900 seconds (or 15 minutes).<\/p>\n

The value of the undo_retention parameter can be set by following these steps:<\/p>\n

    \n
  1. Log in to the Oracle database using the SYS user.<\/li>\n
  2. Use the following command to view the current undo retention value:<\/li>\n
  3. Display the undo retention parameter.<\/li>\n
  4. Use the following command to change the value of undo_retention:<\/li>\n
  5. Change the system setting for undo retention to a specific value for both the current session and all future sessions.<\/li>\n
  6. This is the value for undo_retention that you want to set, in seconds.<\/li>\n
  7. Restart the database to apply the changes.<\/li>\n
  8. Shut down immediately and then start up again.<\/li>\n<\/ol>\n

    Please be aware that changing the value of the undo_retention parameter may impact the performance and resource usage of other databases. Therefore, before making this adjustment, make sure that you fully understand and assess the potential consequences.<\/p>\n","protected":false},"excerpt":{"rendered":"

    The flashback area size in Oracle is determined by the parameter undo_retention. The undo_retention parameter specifies the longest retention time of transactions in an Oracle database, which is the size of the flashback area. By default, the value of the undo_retention parameter is 900 seconds (or 15 minutes). The value of the undo_retention parameter can […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[453,1402,299,1404,1403],"class_list":["post-15498","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-development","tag-guide","tag-programming","tag-technology","tag-tutorial"],"yoast_head":"\nHow should the flashback area size be configured for Or... - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn about how should the flashback area size be configured for oracle?. 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