{"id":10076,"date":"2019-03-05T20:02:04","date_gmt":"2019-03-05T20:02:04","guid":{"rendered":"https:\/\/dbtut.com\/?p=10076"},"modified":"2019-03-05T20:02:05","modified_gmt":"2019-03-05T20:02:05","slug":"there-is-a-slowness-problem-when-you-query-dba_free_space-or-tablespace-in-12c","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2019\/03\/05\/there-is-a-slowness-problem-when-you-query-dba_free_space-or-tablespace-in-12c\/","title":{"rendered":"There is a slowness problem when you query dba_free_space or tablespace in 12c"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>There may be a slowdown when you query dba_free_space or tablespaces via Toad on 12C databases. The slowness is due to the fact that the sys schema, data dictionary and fixed object statistics are out of date. In addition, the presence of too many objects in the recyclebin can cause slowdown. In this case, the statistics should be updated and the objects in the recyclebin should be cleared.<\/p>\n<p><strong>You can update the statistics as below:<\/strong><\/p>\n<pre class=\"lang:default decode:true \">[oracle@db01 ~]$ sqlplus \/ as sysdba\n\nSQL*Plus: Release 12.2.0.1.0 Production on Thu May 11 11:48:34 2017\n\nCopyright (c) 1982, 2016, Oracle.  All rights reserved.\n\n\nConnected to:\nOracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production\n\nSQL&gt; EXEC dbms_stats.gather_schema_stats('SYS', cascade=&gt;TRUE);\n\nPL\/SQL procedure successfully completed.\n\n\nSQL&gt; EXEC DBMS_STATS.GATHER_DICTIONARY_STATS;\n\nPL\/SQL procedure successfully completed.\n\nSQL&gt; EXEC DBMS_STATS.GATHER_FIXED_OBJECTS_STATS(NO_INVALIDATE =&gt; FALSE);\n\nPL\/SQL procedure successfully completed.<\/pre>\n<p><strong>You can delete objects within the recyclebin as follows at database basis:<\/strong><\/p>\n<pre class=\"lang:default decode:true \">[oracle@db01 ~]$ sqlplus \/ as sysdba\n\nSQL*Plus: Release 12.2.0.1.0 Production on Thu May 11 11:48:34 2017\n\nCopyright (c) 1982, 2016, Oracle.  All rights reserved.\n\n\nConnected to:\nOracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production\n\nSQL&gt; purge dba_recyclebin;  \n\nDBA Recyclebin purged.<\/pre>\n\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_10076\" class=\"pvc_stats all  \" data-element-id=\"10076\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; There may be a slowdown when you query dba_free_space or tablespaces via Toad on 12C databases. The slowness is due to the fact that the sys schema, data dictionary and fixed object statistics are out of date. In addition, the presence of too many objects in the recyclebin can cause slowdown. In this case, &hellip;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_10076\" class=\"pvc_stats all  \" data-element-id=\"10076\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[4],"tags":[2346,2336,2348,2345,2337,2342,2344,2343,2340,2341,2335,2347,2349,2338,2339],"class_list":["post-10076","post","type-post","status-publish","format-standard","","category-oracle","tag-12c-slowness","tag-clear-oracle-recyclebin","tag-dba_free_space-queries-too-slow-at-12c","tag-dba_free_space-slowness","tag-delete-objects-in-recyclebin","tag-gather-data-dictionary-stats","tag-gather-fixed-object-statistics","tag-gather-sys-schema-stats","tag-gather_dictionary_stats","tag-gather_fixed_objects_stats","tag-purge-oracle-recyclebin","tag-queries-are-too-slow-at-12c","tag-toad-too-slow-at-12c","tag-update-data-dictionary-statistics","tag-update-sys-schema-statistics"],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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