How To Fix Sql Error Ora-00054
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ora-00054 drop table Locks and ORA-00054 error Oracle Database Tips by Burleson Consulting Question: I'mOra-00054 Truncate
trying to alter a table, and I get an ORA-00054, from what appears to be a locking problem: alter table mytab add newcol char * ERROR at line
Ora 00054 Fix
1: ORA-00054: resource busy and acquire with NOWAIT specified How do I stop the ORA-00054 error? Answer: When I get an ORA-00054, it's usually impossible to do the DDL unless I spend hours inconveniencing end-users by nuking their sessions. For related content, see here, details on the Oracle deadly embrace. Unfortunately, this is often unavoidable in a 24x7 database, especially ora-00054 alter table when you are restructuring a table online with the dbms_redefinition utility. Fixing the ORA-00054 error You need to schedule the 'alter table' for when there is low activity and notify the end-users about the scheduled maintenance. Before 11g, you can mark the tablespace read-only for the duration of the alter table: alter tablespace tab_ts read only In 11g, you can mark the table as read-only to prevent updates during an alter table: alter table mytab read only You can verify that the table is read-only with this command: select table_name, read_onlyfrom dba_tables where owner = ?myowner? and table_name = 'MYTAB'; As an alternative to making the table read-only, you can create a temporary trigger to prevent updates: create or replace trigger tabl_read_only before insert or update or delete on mytab begin raise_application_error (-999999, 'Table mytab is undergoing maintenance. Try again later.'); end; / Details on locks and the ORA-00054 error The Oracle docs are vague on the ORA-00054 error, only suggesting that you re-try the transaction: ORA-00054: resource busy and acquire with NOWAIT specifie
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Enterprise Portal Upgrade Oracle WebCenter Sites Sourcing Staffing & Recruiting gv$access Recruiting Managed Services Candidate Registration Technical Focus Client Opportunities Support Solutions Training Legacy to Oracle WebCenter ora-00054 drop user Oracle Documents Cloud Service Next Generation AP Automation & Dynamic Discounting Oracle WebCenter Contract Lifecycle Management (CLM) Search ORA-00054: resource busy and acquire with NOWAIT specified or http://www.dba-oracle.com/t_ora_00054_locks.htm timeout expiredYou are here: Home / Resources / ORA-00054: resource busy and acquire with NOWAIT specified or timeout ... ORA-00054 Error Message Error ORA-00054 is a commonly seen error by Oracle users and occurs when a user tries to execute a LOCK TABLE or SELECT FOR UPDATE command with the NOWAIT keyword when https://www.tekstream.com/resources/ora-00054-resource-busy-or-timeout-expired/ the resource is unavailable. DDL or DML operations are being run concurrently without proper commits. In most cases, Error ORA-00054? occurs from a session. Any session that has referenced the table and any structural change attempt, such as adding a column, requires an “exclusive" lock. There are several options for tables or views to see locks and specific information about the locks: DBA_BLOCKERS: Shows non-waiting sessions holding locks being waited on DBA_DDL_LOCKS: Shows all DDL locks held or being requested DBA_DML_LOCKS: Shows all DML locks held or being requested DBA_LOCK_INTERNAL: Displays 1 row for every lock/latch held or being requested with the username of who is holding lock DBA_LOCKS: Shows all locks/latches held or being requested DBA_WAITERS: Shows all sessions waiting on but not holding waited for locks The first step the user should take in fixing this error is to wait a few minutes, then try the command again. This simple step may solve the pr
user to complete some operation. The SQL command with either: Had a 'NOWAIT' clause so instead of blocking the statement returns this error. Was DDL and http://www.acehints.com/2011/06/troubleshoot-resolve-ora-00054-resource.html was blocked. DDL or SELECT with FOR UPDATE NOWAIT can raise this error if an incompatible lock is held. How to Check ORA-00054? None normally required unless this is occurring when not https://community.oracle.com/thread/2552670 expected. Check v$lock for locks being held. For DDL repeat the command. If the DDL is issued under DBMS_SQL it is possible to cause this error if the DDL touches ora 00054 an object related to the current PL/SQL block by some dependency. For SELECT FOR UPDATE issue the same statement without the NOWAIT clause to see if the statement blocks (assuming the problem is reproducible). If it blocks check there is a blocker in v$lock to find the blocked process. Query: select * from v$lock where request!=0; select * from v$lock where type='TX' and id1='&1' how to fix and id2='&2' where &1 and &2 are the ID for the lock we are waiting on from above. V$LOCKED_OBJECT: This view lists all locks acquired by every transaction on the system. In order to see locked object query, SQL> set linesize 130 SQL> set pages 100 SQL> col username format a20 SQL> col sess_id format a10 SQL> col object format a25 SQL> col mode_held format a10 SQL> select oracle_username || ' (' || s.osuser || ')' username , s.sid || ',' || s.serial# sess_id , owner || '.' || object_name object , object_type , decode( l.block , 0, 'Not Blocking' , 1, 'Blocking' , 2, 'Global') status , decode(v.locked_mode , 0, 'None' , 1, 'Null' , 2, 'Row-S (SS)' , 3, 'Row-X (SX)' , 4, 'Share' , 5, 'S/Row-X (SSX)' , 6, 'Exclusive', TO_CHAR(lmode)) mode_held from v$locked_object v , dba_objects d , v$lock l , v$session s where v.object_id = d.object_id and v.object_id = l.id1 and v.session_id = s.sid order by oracle_username , session_id / You can also query v$access and v$locked_object to see specific locks: select s.sid, s.serial#, p.spid from v$session s, v$p
CommunityOracle User Group CommunityTopliners CommunityOTN Speaker BureauJava CommunityError: You don't have JavaScript enabled. This tool uses JavaScript and much of it will not work correctly without it enabled. Please turn JavaScript back on and reload this page. Please enter a title. You can not post a blank message. Please type your message and try again. More discussions in General Database Discussions All PlacesDatabaseGeneral Database Discussions This discussion is archived 4 Replies Latest reply on Jun 20, 2013 1:14 PM by 985871 ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired 985871 Jun 20, 2013 12:58 PM Hi All , I am using oracle 11.2.0.3 with 3 node rac with ODI . I have the below table which i am not able to drop and giving the error . SQL> drop table I$_CDS_FAULT_DEV1;drop table I$_CDS_FAULT_DEV1 *ERROR at line 1:ORA-00054: resource busy and acquire with NOWAIT specified or timeout expiredSQL> show parameter ddl_lockNAME TYPE VALUE------------------------------------ ----------- ------------------------------ddl_lock_timeout integer 300i changed to 100 but still the same error also i have checked and there are no locks . Can you please provide me a way to resolve this issue . Regards , DBApps 54087Views Tags: none (add) 00054Content tagged with 00054, busyContent tagged with busy, resourceContent tagged with resource This content has been marked as final. Show 4 replies 1. Re: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired DK2010 Jun 20, 2013 1:01 PM (in response to 985871) Hi,It means some session accessing that table. you can Query from v$accessFind that sid and kill that sid and drop the tableHTH Like Show 0 Likes(0) Actions 2. Re: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired sybrand_b Jun 20, 2013 1:05 PM (in response to 985871) For sure there are locks, as the table is in use.Drop table wants an exclusive lock on the corresponding dictionary record(s).Whenever the table is in use there will be a row-share lock on that record in the dictionary.Did you consult gv$access ?Please do so now.------------- Sybrand BakkerSenior Oracle DBA Like Show 1 Likes(1) Actions 3. Re: ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired Niket Kumar Jun 20, 2013 1:05 PM (in response to 985871) http://abeytom.blogspot.in/2012/08/finding-and-fixing-ora-00054-resource.html Like Sho