Oracle Error 12008
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May 26, 2015 Question: I am using dbms_redefinition to redefine a table and I am getting an ORA-12008 and an ORA-01555 error: ORA-12008: error in materialized view refresh https://blogs.oracle.com/db/entry/master_note_for_mview_ora-_error_diagnosis_for_materialized_view_create_or_refresh pathORA-01555: snapshot too old: rollback segment number with name "" too small ORA-22924: snapshot too old ORA-06512: at "SYS.DBMS_REDEFINITION", line 52 ORA-06512: at "SYS.DBMS_REDEFINITION", line 1646 Why do I see a ORA-12800 error? Answer:The dbms_redefinition uses a materialized view during the reorganization to manage the updates that occur while the table is being copied and re-named. http://www.dba-oracle.com/t_ora_12800.htm In your case, the ORA-12008 error is a phantom error message, with your true error being the ORA-01555. The oerr utility show this on the ORA-12008 error: ORA-12008: error in materialized view refresh path Cause: Table SNAP$_ reads rows from the view MVIEW$_, which is a view on the master table (the master may be at a remote site). Any error in this path will cause this error at refresh time. For fast refreshes, the table .MLOG$_ is also referenced.Action: Examine the other messages on the stack to find the problem. See if the objects SNAP$_, MVIEW$_, .@, .MLOG$_@ still exist.
Get the Complete Oracle SQL Tuning Information The landmark book "Advanced Oracle SQL Tuning The Definitive Reference" is filled with valuable information on Oracle SQL Tuning. This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher. Burleson is the American Team Note: Thihere for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring http://stackoverflow.com/questions/25756418/oracle-materialized-view-refresh-fails-with-ora-01555 developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Oracle Materialized View Refresh fails with ORA-01555 up vote 1 down vote favorite I've a Materialized view set to refresh on demand: CREATE MATERIALIZED VIEW XYZ REFRESH COMPLETE ON DEMAND AS SELECT * error in FROM ABC WHERE LAST_UPD > SYSDATE-30; When i run a procedure for refresh it fails every two days. Refresh command: dbms_mview.refresh(list => 'XYZ', method => 'C', parallelism => 0, atomic_refresh => false); Error: 1 - ERROR IN MERGE : ORA-12008: error in materialized view refresh path ORA-01555: snapshot too old: rollback segment number 406 with name "_SYSSMU406_3487494604$" too small ORA-02063: preceding line from IJSFASIEBEL I've read that using select * to create the Materialized view can cause this error, error in materialized but i've dropped the view and recreated it many times, the refresh runs fine one day and gets erred out the next day. No changes were made to the base table. Can anyone tell me what the error message means or what might be causing the issue? materialized-views ora-01555 share|improve this question edited Sep 10 '14 at 2:37 WW. 14.7k75893 asked Sep 10 '14 at 2:28 Pratheek Ponnuru 612 add a comment| 2 Answers 2 active oldest votes up vote 0 down vote The problem is that your rollback segments are not large enough for the query that is being run given the other updates happening on the database at the same time. There is a full discussion of what this means here: https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:275215756923 Possible solutions:- Create larger rollback segment to allow more changes to occur during the refresh without running out of rollback space Creating an index on LAST_UPD to improve the speed of the query (if indeed it does) Running the refresh at a quieter time of day share|improve this answer answered Sep 10 '14 at 2:36 WW. 14.7k75893 add a comment| up vote 0 down vote Pratheek Ponnuru, Please check if any LOB are there in the table , the check for lob corruption. If LOB are corrupted then this error used to come.... I had faced same issue recently, I check the corruption for all lobs in the table and post further inv