Question: How to find out the existence of different types of files and backups available with the usage of space in the Flash Recovery Area? Starting with Oracle 10G Release 2, a new view has been made available: V$FLASH_RECOVERY_AREA_USAGE. V$FLASH_RECOVERY_AREA_USAGE shows the percentage of the total disk quota used by different types of files, and how much space for each type of file can be reclaimed by deleting files that are obsolete, redundant, or already backed up to tape. SQL> … [Read more...] about How to Identify Different File types and space used in Flash Recovery Area
Oracle 10g
Database Crashed With ORA-19815, ORA-19809, ORA-16038
The Problem Instance terminated due to error 16038 as its not able to archive the log in FRA: ORA-19815: WARNING: db_recovery_file_dest_size of 99614720000 bytes is 100.00% used, and has 0 remaining bytes available. Sat Mar 8 00:57:07 2008 ************************************************************************ You have following choices to free up space from flash recovery area: 1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard, then consider changing RMAN … [Read more...] about Database Crashed With ORA-19815, ORA-19809, ORA-16038
Rman Backups Failing with RMAN-20004
The Problem Recovery catalog has been configured. Production Database has been cloned and a connection has been made from the clone to Catalog database using rman. DBID of the clone instance has not been changed, (so is identical with source DBID). Rman backup fails with: RMAN-00571: RMAN-00569: RMAN-00571: RMAN-03002: failure of resync command at 01/5/2009 08:10:05 RMAN-06004: ORACLE error from recovery catalog database RMAN-20004: target database name does not match name in … [Read more...] about Rman Backups Failing with RMAN-20004
Oracle Database – How to Rename a Datafile with Special Characters Created by Mistake
Question: We have mistakenly create a datafile with special charatcers. Also we get error ORA-01516 when we try to rename it using the normal method: sql> alter database rename file 'old_file_name' to 'new_file_name'; The Solution 1. Bring the Tablespace offline. sql> alter tablespace [tablespace name] offline; 2. Copy/Move the File at the OS level specifying the correct file name. 3. If there is no special character then the solution is: sql> alter database rename file … [Read more...] about Oracle Database – How to Rename a Datafile with Special Characters Created by Mistake
How to Rename or Move Datafiles and Logfiles in Oracle Database
How to Rename or Move Datafiles and Logfiles In many situations, a datafile or logfile must be renamed inside Oracle. Whereas the contents of the file remain valid, you need to define a new physical name or location for it. For example: You want to move a database file to a different disk for performance or maintenance reasons. You have restored a datafile from backup, but the disk where it should normally be placed has crashed and you need to relocate it to a different disk. You have … [Read more...] about How to Rename or Move Datafiles and Logfiles in Oracle Database
How To Size UNDO Tablespace For Automatic Undo Management
Sizing an UNDO tablespace requires three pieces of data. (UR) UNDO_RETENTION in seconds (UPS) Number of undo data blocks generated per second (DBS) Overhead varies based on extent and file size (db_block_size) The undo space needed is calculated as: UndoSpace = UR * (UPS * DBS) Two of the pieces of information can be obtained from the instance configuration: UNDO_RETENTION and DB_BLOCK_SIZE. The third piece of the formula requires a query being run against the database. The maximum … [Read more...] about How To Size UNDO Tablespace For Automatic Undo Management