How would you force a log switch?

How would you force a log switch?
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1 Answer

Answer :

ALTER SYSTEM SWITCH LOGFILE;
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Related questions

What is Log Switch ?

Description : What is Log Switch ?

Last Answer : The point at which ORACLE ends writing to one online redo log file and begins writing to another is called a log switch.

What is the use of redo log information?

Description : What is the use of redo log information?

Last Answer : The information in a redo log file is used only to recover the database from a system or media failure prevents database data from being written to a database's data files.

What is the function of redo log?

Description : What is the function of redo log?

Last Answer : The primary function of the redo log is to record all changes made to data.

What is a redo log?

Description : What is a redo log?

Last Answer : The set of redo log files for a database is collectively known as the database redo log.

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Description : What is Archived Redo Log ?

Last Answer : Archived Redo Log consists of Redo Log files that have archived before being reused.

What is On-line Redo Log?

Description : What is On-line Redo Log?

Last Answer : The On-line Redo Log is a set of tow or more on-line redo files that record all committed changes made to the database. Whenever a transaction is committed, the corresponding redo entries temporarily ... file by the background process LGWR. The on-line redo log files are used in cyclical fashion.

What is meant by redo log buffer ?

Description : What is meant by redo log buffer ?

Last Answer : Changes made to entries are written to the on-line redo log files. So that they can be used in roll forward operations during database recoveries. Before writing them into the redo log files ... buffers in SGA and LGWR will write into files frequently. LOG_BUFFER parameter will decide the size.

What is meant by Redo Log file mirroring ? How it can be achieved?

Description : What is meant by Redo Log file mirroring ? How it can be achieved?

Last Answer : Process of having a copy of redo log files is called mirroring. This can be achieved by creating group of log files together, so that LGWR will automatically writes them to all the members ... . If any one group fails then database automatically switch over to next group. It degrades performance.

How does one backup archived log files? (for DBA

Description : How does one backup archived log files? (for DBA

Last Answer : One can backup archived log files using RMAN or any operating system backup utility. Remember to delete files after backing them up to prevent the archive log directory from filling up. If the ... oracle/arch_backup/log_t%t_s%s_p%p' 5> (archivelog all delete input); 6> release channel dev1; 7> }

What is a SNAPSHOT LOG ?

Description : What is a SNAPSHOT LOG ?

Last Answer : A snapshot log is a table in the master database that is associated with the master table. ORACLE uses a snapshot log to track the rows that have been updated in the master table. Snapshot logs are used in updating the snapshots based on the master table.

What is snapshot log ?

Description : What is snapshot log ?

Last Answer : It is a table that maintains a record of modifications to the master table in a snapshot. It is stored in the same database as master table and is only available for simple snapshots. It should be created before creating snapshots.

When will the data in the snapshot log be used?

Description : When will the data in the snapshot log be used?

Last Answer : We must be able to create a after row trigger on table (i.e., it should be not be already available) After giving table privileges. We cannot specify snapshot log name because oracle uses the ... 23 characters. (The table name created will be MLOGS_tablename, and trigger name will be TLOGS name).

How can we specify the Archived log file name format and destination?

Description : How can we specify the Archived log file name format and destination?

Last Answer : By setting the following values in init.ora file. LOG_ARCHIVE_FORMAT = arch %S/s/T/tarc (%S - Log sequence number and is zero left paded, %s - Log sequence number not padded. %T - Thread number lef ... not padded). The file name created is arch 0001 are if %S is used. LOG_ARCHIVE_DEST = path.

What is a Redo Log ?

Description : What is a Redo Log ?

Last Answer : The set of Redo Log files YSDATE,UID,USER or USERENV SQL functions,or the pseudo columns LEVEL or ROWNUM.

What is Mirrored on-line Redo Log ?

Description : What is Mirrored on-line Redo Log ?

Last Answer : A mirrored on-line redo log consists of copies of on-line redo log files physically located on separate disks, changes made to one member of the group are made to all members.

What are database files, control files and log files. How many of these files should a database have at least? Why?

Description : What are database files, control files and log files. How many of these files should a database have at least? Why?

Last Answer : ∙ Database Files The database files hold the actual data and are typically the largest in size. Depending on their sizes, the tables (and other objects) for all the user accounts can go in one ... or redo log file to the database, the information is recorded in the control files. ∙ Redo Logs

What is the purpose of Redo Log files?

Description : What is the purpose of Redo Log files?

Last Answer : Before Oracle changes data in a datafile it writes these changes to the redo log. If something happens to one of the datafiles, a backed up datafile can be restored and the redo, that was written since, replied, which brings the datafile to the state it had before it became unavailable.

Which log would you check if a database has a problem?

Description : Which log would you check if a database has a problem?

Last Answer : Alert log

How do you switch from an init.ora file to a spfile?

Description : How do you switch from an init.ora file to a spfile?

Last Answer : Issue the create spfile from pfile command.

How does one switch to another user in Oracle? (for DBA

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Last Answer : Users normally use the "connect" statement to connect from one database user to another. However, DBAs can switch from one user to another without a password. Of course it is not advisable to ... tiger Connected. Note: Also see the su.sql script in the Useful Scripts and Sample Programs Page.

What is Log Switch?

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Last Answer : The point at which ORACLE ends writing to one online redo log file and begins writing to another is called a log switch.

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A rectangular log of wood is floating in water with a load of 100 N at its centre. The maximum shear force in the wooden log is (A) 50 N at each end (B) 50 N at the centre (C) 100 N at the centre (D) None of these

Description : A rectangular log of wood is floating in water with a load of 100 N at its centre. The maximum shear force in the wooden log is (A) 50 N at each end (B) 50 N at the centre (C) 100 N at the centre (D) None of these

Last Answer : (C) 100 N at the centre

What does "jumps off the screen" mean?

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Where can one get more information about TCL? (for DBA

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Explain UNION,MINUS,UNION ALL, INTERSECT ?

Description : Explain UNION,MINUS,UNION ALL, INTERSECT ?

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Description : WHAT IS RMAN ? (for DBA

Last Answer : Recovery Manager is a tool that: manages the process of creating backups and also manages the process of restoring and recovering from them.

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Last Answer : PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.

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Last Answer : Procedure Specification and Procedure Body.

What are the datatypes a available in PL/SQL ?

Description : What are the datatypes a available in PL/SQL ?

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