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What Is Archived Redo Log

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The "log_checkpoint_timeout" parameter does not control when a logfile will switch, which is the triggering event that causes a log to be archived. It merely does a datafile checkpoint, which means that your data file headers are updated e...
http://www.experts-exchange.com/Q_20412935.htm   See entire page »
Well, it is really difficult to give those parameters without seeing the applications and being a little more familar with its overall operation. So let me say this: any answer given will be really subjective! > I need to know the o...
http://www.experts-exchange.com/Database/Oracle/Q_2014...   See entire page »
When you have group then on each group you have an active online log, anything written to one log will be written to the match log in the other groups (assuming they avail). When there is log switch Oracle write the memory to the new logs, ...
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Redo logs contains all the changes user made in data files.. Archive log is oracle way of saving Redo logs for later use.. mostly for recovery.. Archive log is not for saving space.. it is to help dba to restore oracle database to a point o...
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Hi, The steps needed are: 1. move / delete some archivelogs (move preferrred). Once you make space on the drive, the archiver can finish writing the logs and free up the database. 2. shutdown 3. take offline cold backup 4. startup mount 5. ...
http://www.experts-exchange.com/Q_21021245.htm   See entire page »
Standby database needs arhived logs from point of creating standby control file whether data is there or not. - create standby control file - switch logfile - take physical file copy either hot or cold - move the physical file/logs copy and...
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The log books are in the hands of Donald Crowhurst's wife Clair. She's had them for 40 years. Early on after Donald's death, she would read them every day looking for some answers.
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Hi Johnny; This should do what you want. Imports System.IO Imports System.Text.RegularExpressions Dim filename As String = "C:\Temp\LogFile.log" Dim nl As String = ControlChars.CrLf Dim sr As New StreamReader(filenam...
http://www.experts-exchange.com/Q_21784127.htm   See entire page »
1) For a standby database, it is in either * READONLY or in RECOVERY mode. While in READONLY, no archivelogs can be applied, thus A is definitively wrong. * C is wrong also, because RECOVER does not apply to standy databases * D is te...
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When the data is written in the archive log file
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No, there is no other way. It is perfectly safe to do, and does not harm the database at all. I do it all the time. If you look in V$LOG, you can see that some of the log groups should be INACTIVE, those are the only ones you can drop. T...
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you can, try this... startup mount alter database noarchivelog (if it was in archivelog mode) alter database add logfile member 'new_redo_file_full_path' to group 'your_redo_group_number' alter database drop logfile member 'old_redo_file' ...
http://www.experts-exchange.com/Developer/Database/Orac...   See entire page »
First check that ORACLE_HOME and ORACLE_SID are set correctly, and if not, do so and re-start. Else, continue as follows. Recover the loss of an inactive, online redo log group. ALTER DATABASE CLEAR LOGFILE 'filename'; If there is more t...
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Well, your recovery options will depend upon what you have for a database backup, archive logs, and/or a database export. You will not be able to open the database, even with resetlogs option, in the current situation. Yes, Oracle support...
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When a transaction commits, the LGWR process immediately records the transaction in the online redo log file. So, the redo logs contain details of all the committed transactions, which may or may not have been recorded *yet* in the datafile...
http://www.experts-exchange.com/Database/Oracle/Q_20373...   See entire page »
The short answer is, you don't. The ability to do "nologging" is limited to a very few actions, like index creation, batch loads, and "create table as select". You can TRUNCATE a table and not generate a lot of redo. If you used table part...
http://www.experts-exchange.com/Q_10240033.html   See entire page »
The answer is, your workload will generage B bytes of redo per transaction, and so will generate T x B amount of redo, where T is your number of transactions. (Note that different transactions will generate different amounts of redo, some ...
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It is a hard task to damage the online redo log. Do some insert statements and before COMMIT replace or change the onlineredo log. After that try to ROLLBACK. Normally you will not be able to access the undo file. In Unix/Linux it is easier...
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Quot from "Oracle Internet Directory Adm. Guide" ---- From book Page 15-12 --- n Redo Log Buffers Set to 32768 (32k) as an initial estimate. If log write performance becomes a performance problem, use a large enough value to make sure (redo...
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