{"id":1352,"date":"2015-02-28T22:38:40","date_gmt":"2015-03-01T01:38:40","guid":{"rendered":"http:\/\/www.dbarj.com.br\/?p=1352"},"modified":"2015-02-28T22:41:53","modified_gmt":"2015-03-01T01:41:53","slug":"how-to-delete-the-incarnations-of-an-oracle-database","status":"publish","type":"post","link":"https:\/\/www.dbarj.com.br\/en\/2015\/02\/how-to-delete-the-incarnations-of-an-oracle-database\/","title":{"rendered":"How to delete the incarnations of an Oracle Database"},"content":{"rendered":"<p>In this article, I will talk about database incarnation and how to clean the old and obsoletes ones. <strong>It&#8217;s not intended to show you how to clean the incarnations on the recovery catalog<\/strong>, but from the database itself! Let&#8217;s start.<\/p>\n<p>Sometimes, after performing several database recoveries or &#8220;open resetlogs&#8221;, you can end up with so many incarnations like the example below:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; select * from v$database_incarnation;\r\n\r\nINCARNATION# RESETLOGS_CHANGE# RESETLOGS PRIOR_RESETLOGS_CHANGE# PRIOR_RES STATUS  RESETLOGS_ID PRIOR_INCARNATION# FLASHBACK_DATABASE_ALLOWED\r\n------------ ----------------- --------- ----------------------- --------- ------- ------------ ------------------ --------------------------\r\n           1                 1 21-FEB-15                       0           PARENT     872244120                  0 NO\r\n           2            234372 21-FEB-15                       1 21-FEB-15 PARENT     872245610                  1 NO\r\n           3            234654 21-FEB-15                  234372 21-FEB-15 PARENT     872245666                  2 NO\r\n           4            234936 21-FEB-15                  234654 21-FEB-15 PARENT     872245693                  3 NO\r\n           5            235216 21-FEB-15                  234936 21-FEB-15 PARENT     872245720                  4 NO\r\n           6            235456 21-FEB-15                  235216 21-FEB-15 PARENT     872245740                  5 NO\r\n           7            235801 21-FEB-15                  235456 21-FEB-15 PARENT     872245759                  6 NO\r\n           8            236041 21-FEB-15                  235801 21-FEB-15 PARENT     872245779                  7 NO\r\n           9            236396 21-FEB-15                  236041 21-FEB-15 CURRENT    872245797                  8 YES\r\n\r\n9 rows selected.<\/pre>\n<p>Another way to list the incarnations\u00a0is through RMAN:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">RMAN&gt; list incarnation;\r\n\r\nList of Database Incarnations\r\nDB Key  Inc Key DB Name  DB ID            STATUS  Reset SCN  Reset Time\r\n------- ------- -------- ---------------- --- ---------- ----------\r\n1       1       ORCL     1400024856       PARENT  1          21-FEB-15\r\n2       2       ORCL     1400024856       PARENT  234372     21-FEB-15\r\n3       3       ORCL     1400024856       PARENT  234654     21-FEB-15\r\n4       4       ORCL     1400024856       PARENT  234936     21-FEB-15\r\n5       5       ORCL     1400024856       PARENT  235216     21-FEB-15\r\n6       6       ORCL     1400024856       PARENT  235456     21-FEB-15\r\n7       7       ORCL     1400024856       PARENT  235801     21-FEB-15\r\n8       8       ORCL     1400024856       PARENT  236041     21-FEB-15\r\n9       9       ORCL     1400024856       CURRENT 236396     21-FEB-15<\/pre>\n<p>Having a lot incarnations is not really a problem, but if you are\u00a0addicted for cleaning and organization like me, sometimes is good to put all this mess in trash.<\/p>\n<p>So, where is this incarnation information kept? <strong>Answer: In the control file.<\/strong> So it&#8217;s not so easy to delete or remove them, as it would be if it was inside any dictionary table.<\/p>\n<p>In 11g Release 2, if you query the\u00a0v$controlfile_record_section you will have the result like the below:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; select rownum,t.* from v$controlfile_record_section t;\r\n\r\n    ROWNUM TYPE                         RECORD_SIZE RECORDS_TOTAL RECORDS_USED FIRST_INDEX LAST_INDEX LAST_RECID\r\n---------- ---------------------------- ----------- ------------- ------------ ----------- ---------- ----------\r\n         1 DATABASE                             316             1            1           0          0          0\r\n         2 CKPT PROGRESS                       8180             4            0           0          0          0\r\n         3 REDO THREAD                          256             1            1           0          0          0\r\n         4 REDO LOG                              72             5            3           0          0         27\r\n         5 DATAFILE                             520           100            4           0          0       2853\r\n         6 FILENAME                             524          2275           11           0          0          0\r\n         7 TABLESPACE                            68           100            5           0          0          5\r\n         8 TEMPORARY FILENAME                    56           100            1           0          0          1\r\n         9 RMAN CONFIGURATION                  1108            50            3           0          0          3\r\n        10 LOG HISTORY                           56           292           16           1         16         16\r\n        11 OFFLINE RANGE                        200           163            0           0          0          0\r\n        12 ARCHIVED LOG                         584           280           39           1         39         39\r\n        13 BACKUP SET                            40           409            6           1          6          6\r\n        14 BACKUP PIECE                         736           200            6           1          6          6\r\n        15 BACKUP DATAFILE                      200           245            7           1          7          7\r\n        16 BACKUP REDOLOG                        76           215            2           1          2          2\r\n        17 DATAFILE COPY                        736           200            0           0          0          0\r\n        18 BACKUP CORRUPTION                     44           371            0           0          0          0\r\n        19 COPY CORRUPTION                       40           409            0           0          0          0\r\n        20 DELETED OBJECT                        20           818           24           1         24         24\r\n        21 PROXY COPY                           928           211            0           0          0          0\r\n        22 BACKUP SPFILE                        124           131            0           0          0          0\r\n        23 DATABASE INCARNATION                  56           292            9           1          9          9\r\n        24 FLASHBACK LOG                         84          2048            2           0          0          0\r\n        25 RECOVERY DESTINATION                 180             1            1           0          0          0\r\n        26 INSTANCE SPACE RESERVATION            28          1055            1           0          0          0\r\n        27 REMOVABLE RECOVERY FILES              32          1000            5           0          0          0\r\n        28 RMAN STATUS                          116           141           74           1         74         74\r\n        29 THREAD INSTANCE NAME MAPPING          80             1            1           0          0          0\r\n        30 MTTR                                 100             1            1           0          0          0\r\n        31 DATAFILE HISTORY                     568            57            0           0          0          0\r\n        32 STANDBY DATABASE MATRIX              400            31           31           0          0          0\r\n        33 GUARANTEED RESTORE POINT             212          2048            0           0          0          0\r\n        34 RESTORE POINT                        212          2083            0           0          0          0\r\n        35 DATABASE BLOCK CORRUPTION             80          8384            0           0          0          0\r\n        36 ACM OPERATION                        104            64            6           0          0          0\r\n        37 FOREIGN ARCHIVED LOG                 604          1002            2           1          2          2\r\n\r\n37 rows selected.\r\n\r\nSQL&gt;<\/pre>\n<p>The Incarnation information is in the line 23.<\/p>\n<p>If\u00a0you view the code\u00a0<span style=\"color: #000080;\">DBMS_BACKUP_RESTORE<\/span>, you can check that there is a\u00a0constant binary_integer called\u00a0<span style=\"color: #000080;\">RTYP_INCARNATION<\/span> with that same value, 23. This means that the Incarnation information is inside <span style=\"text-decoration: underline;\"><strong>SECTION 23<\/strong><\/span> in control file (remember, here we are using 11gR2).<\/p>\n<p>So, why I&#8217;m talking about this number 23? Because the first way I tried to clean was running the\u00a0resetcfilesection passing the section 23 as parameter. <span style=\"color: #800000;\"><strong>But do not do that!<\/strong><\/span><\/p>\n<p>If you clean all the section 23 running the unsupported procedure &#8220;<strong>sys.dbms_backup_restore.resetcfilesection(23);<\/strong>&#8220;, you will indeed clean all the incarnations, but also the current one. This will give you a lot of <span style=\"text-decoration: underline;\">ORA-00600<\/span> and will <span style=\"text-decoration: underline;\">crash<\/span> your database (believe in me, I tested it).<\/p>\n<p>So, the only way to clean it (if you are not an oracle engineer and don&#8217;t know how to\u00a0hex edit and dump the control file), is recreating the control file. Unfortunately, you will need to bring down your DB to use that approach.<\/p>\n<p>First of all, make a backup of your current control file (both binary and to trace):<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; alter database backup controlfile to trace as '\/tmp\/control.txt';\r\n\r\nDatabase altered.\r\n\r\nSQL&gt; alter database backup controlfile to '\/tmp\/control.ctl';\r\n\r\nDatabase altered.<\/pre>\n<p>After that, shutdown and put your database in nomount mode:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; shutdown immediate;\r\nDatabase closed.\r\nDatabase dismounted.\r\nORACLE instance shut down.\r\nSQL&gt; startup nomount;\r\nORACLE instance started.\r\n\r\nTotal System Global Area  627732480 bytes\r\nFixed Size                  1346756 bytes\r\nVariable Size             373293884 bytes\r\nDatabase Buffers          247463936 bytes\r\nRedo Buffers                5627904 bytes\r\nSQL&gt;<\/pre>\n<p>Now, get the contents of your trace control file and recreate your control file using the NORESETLOGS case:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; CREATE CONTROLFILE REUSE DATABASE \"ORCL\" NORESETLOGS  ARCHIVELOG\r\n2        MAXLOGFILES 5\r\n3        MAXLOGMEMBERS 5\r\n4        MAXDATAFILES 100\r\n5        MAXINSTANCES 1\r\n6        MAXLOGHISTORY 292\r\n7    LOGFILE\r\n8      GROUP 1 '\/u01\/app\/oracle\/orcl\/oradata\/redo01a.log'  SIZE 100M BLOCKSIZE 512,\r\n9      GROUP 2 '\/u01\/app\/oracle\/orcl\/oradata\/redo02a.log'  SIZE 100M BLOCKSIZE 512,\r\n10     GROUP 3 '\/u01\/app\/oracle\/orcl\/oradata\/redo03a.log'  SIZE 100M BLOCKSIZE 512\r\n11   -- STANDBY LOGFILE\r\n12   DATAFILE\r\n13     '\/u01\/app\/oracle\/orcl\/oradata\/system01.dbf',\r\n14     '\/u01\/app\/oracle\/orcl\/oradata\/sysaux01.dbf',\r\n15     '\/u01\/app\/oracle\/orcl\/oradata\/undotbs01.dbf',\r\n16     '\/u01\/app\/oracle\/orcl\/oradata\/users01.dbf'\r\n17   CHARACTER SET AL32UTF8\r\n18   ; \r\n\r\nControl file created.\r\n\r\nSQL&gt;<\/pre>\n<p>Good. Note that no recovery is needed as you shutdown your DB gracefully:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; RECOVER DATABASE;\r\nORA-00283: recovery session canceled due to errors\r\nORA-00264: no recovery required<\/pre>\n<p>So finally, lets open it again:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; alter database open;\r\n\r\nDatabase altered.\r\n\r\nSQL&gt;<\/pre>\n<p><strong>Don&#8217;t forget to also recreate any temporary tablespace datafile, set up the default\u00a0RMAN configurations or to\u00a0re-catalog\u00a0any other information that is kept in\u00a0control file.<\/strong><\/p>\n<p>Checking now the incarnations, we can see that we have only the current one:<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"oracledb\">SQL&gt; select * from v$database_incarnation;\r\n\r\nINCARNATION# RESETLOGS_CHANGE# RESETLOGS PRIOR_RESETLOGS_CHANGE# PRIOR_RES STATUS  RESETLOGS_ID PRIOR_INCARNATION# FLASHBACK_DATABASE_ALLOWED\r\n------------ ----------------- --------- ----------------------- --------- ------- ------------ ------------------ --------------------------\r\n           1            236396 21-FEB-15                  236041 21-FEB-15 CURRENT    872245797                  0 NO\r\n\r\nSQL&gt;<\/pre>\n<p>Good, now you have your database cleaner.<\/p>\n<b>Have you enjoyed? Please leave a comment or give a \ud83d\udc4d!<\/b>\n<div class='watch-action'><div class='watch-position align-left'><div class='action-like'><a class='lbg-style2 like-1352 jlk' href='javascript:void(0)' data-task='like' data-post_id='1352' data-nonce='7596861fb6' 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-1352 lc'>+34<\/span><\/a><\/div><\/div> <div class='status-1352 status align-left'><\/div><\/div><div class='wti-clear'><\/div>","protected":false},"excerpt":{"rendered":"<p>In this article, I will talk about database incarnation and how to clean the old and obsoletes ones. It&#8217;s not intended to show you how to clean the incarnations on the recovery catalog, but from the database itself! Let&#8217;s start. Sometimes, after performing several database recoveries or &#8220;open resetlogs&#8221;, you can end up with so &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/www.dbarj.com.br\/en\/2015\/02\/how-to-delete-the-incarnations-of-an-oracle-database\/\">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":[15],"tags":[],"class_list":["post-1352","post","type-post","status-publish","format-standard","hentry","category-database-en","item-wrap"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to delete the incarnations of an Oracle Database - DBA - Rodrigo Jorge - Oracle Tips and Guides<\/title>\n<meta name=\"description\" content=\"Step by step of how to delete the incarnations of an Oracle Database\" \/>\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\/02\/how-to-delete-the-incarnations-of-an-oracle-database\/\" \/>\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=\"5 minutes\" \/>\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\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/\"},\"author\":{\"name\":\"DBA RJ\",\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/#\\\/schema\\\/person\\\/28a44ca3a6633fe4156ad1ea209d40a9\"},\"headline\":\"How to delete the incarnations of an Oracle Database\",\"datePublished\":\"2015-03-01T01:38:40+00:00\",\"dateModified\":\"2015-03-01T01:41:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/\"},\"wordCount\":451,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/#\\\/schema\\\/person\\\/28a44ca3a6633fe4156ad1ea209d40a9\"},\"articleSection\":[\"Oracle Database General\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/\",\"url\":\"https:\\\/\\\/www.dbarj.com.br\\\/en\\\/2015\\\/02\\\/how-to-delete-the-incarnations-of-an-oracle-database\\\/\",\"name\":\"How to delete the incarnations of an Oracle Database - 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