{"id":735,"date":"2023-11-23T17:47:00","date_gmt":"2023-11-23T17:47:00","guid":{"rendered":"https:\/\/test.samplewebsitelink.com\/ordba\/?p=735"},"modified":"2023-11-23T17:47:02","modified_gmt":"2023-11-23T17:47:02","slug":"mv-log","status":"publish","type":"post","link":"https:\/\/test.samplewebsitelink.com\/ordba\/2023\/11\/23\/mv-log\/","title":{"rendered":"MV LOG"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

MV LOG<\/p>\n\n\n\n

Determine why that log table is growing<\/p>\n\n\n\n

First, determine why the MV log is growing.<\/p>\n\n\n\n

This is most likely linked to a registered MView that no longer exists or has not been refreshed for a long time (for example, MViews set to refresh manually or a large time intervals, as well as MViews that do no longer exist)<\/p>\n\n\n\n

To find out which MViews are not refreshing, see the following article:<\/p>\n\n\n\n

“Scripts to Report Information about Materialized View Logs at the Master Site” (Doc ID 236292.1)<\/p>\n\n\n\n

Once the MV logs become very large, normal purging of the MV Logs as outlined in Note 1031924.6will not be efficient.<\/p>\n\n\n\n

Dropping a stale MView will in turn cause expensive DELETE DML on the MV Log and may therefore not be desiraable.<\/p>\n\n\n\n

Dropping and re-creating the MV LOG itself does not work since we still have FAST REFRESHABLE MViews defined. This prevents the MV Log to be dropped.<\/p>\n\n\n\n

Considering that it is probably more expensive \/ disruptive to drop all the MViews in order to drop the MV LOGs, a better option is to TRUNCATE the MV LOG, provided that we do not miss any updates to the MV logs in the meantime.<\/p>\n\n\n\n

The general steps to TRUNCATE the MV LOG are documented here:<\/p>\n\n\n\n

Oracle<\/p>\n","protected":false},"excerpt":{"rendered":"

MV LOG Determine why that log table is growing First, determine why the MV log is growing. This is most likely linked to a registered MView that no longer exists or has not been refreshed for a long time (for example, MViews set to refresh manually or a large time intervals, as well as MViews …<\/p>\n

MV LOG<\/span> Read More »<\/a><\/p>\n","protected":false},"author":1,"featured_media":504,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[10],"tags":[],"class_list":["post-735","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-oracle"],"yoast_head":"\nMV LOG - Ordba<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/test.samplewebsitelink.com\/ordba\/2023\/11\/23\/mv-log\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MV LOG - Ordba\" \/>\n<meta property=\"og:description\" content=\"MV LOG Determine why that log table is growing First, determine why the MV log is growing. 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