redo log files in sql
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6 Managing the Redo Log - Oracle Help Center
- https://docs.oracle.com/cd/B19306_01/server.102/b14231/onlineredo.htm
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The redo log of a database consists of two or more redo log files. The database requires a minimum of two files to guarantee that one is always available for writing while the other is being archived (if the database is in ARCHIVELOG mode). See "Managing Archived Redo Logs" for more information. LGWR writes to redo log files in a circular fashion.
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12 Managing the Redo Log - Oracle Help Center
- https://docs.oracle.com/cd/E11882_01/server.112/e25494/onlineredo.htm
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Redo log files are filled with redo records. A redo record, also called a redo entry, is made up of a group of change vectors, each of which is a description ...
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Query for Redo log Files and finding various details
- https://www.funoracleapps.com/2020/03/query-for-redo-log-files-and-finding.html
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Query for Redo log Files and finding various details. Query for Redo log Files and finding various details Home; My Oracle Ace Journey; Oracle; _Oracle DBA; _Oracle Apps; _Cloud; _Weblogic ... SQL Developer SSO Service Groups oraclecloud rman setup Articles Index Apr 2022 (4) Mar 2022 (13) Feb 2022 (25) Jan 2022 (11) Dec 2021 (9) Nov 2021 (17 ...
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Redo Log File Options - Oracle Help Center
- https://docs.oracle.com/database/121/SUTIL/GUID-C50E9C76-ABA1-4A27-AAB4-C65479EDFDE0.htm
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Redo Log File Options · Automatically. If LogMiner is being used on the source database, then you can direct LogMiner to find and create a list of redo log files ...
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Find Redo Log Size / Switch Frequency / Location in Oracle
- https://orahow.com/find-redo-log-size-switch-frequency-location/
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Redo logs are the most crucial part of the Oracle database. As a part of tuning, you must check the redo log size and switch frequency. For proper functioning of the Oracle database you must avoid frequent log switches. Oracle redo logs consists of two or more pre-allocated files which record all changes made to the database.
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11 Managing the Redo Log - Database - Oracle Help Center
- https://docs.oracle.com/database/121/ADMIN/onlineredo.htm
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Multiplexing is implemented by creating groups of redo log files. A group consists of a redo log file and its multiplexed copies. Each identical copy is said to ...
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Using REDO SQL - Documentation for BMC AMI Log Master for Db2 12.1 - BMC ...
- https://docs.bmc.com/docs/logmasterfordb2/121/using-redo-sql-857522907.html
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Generate REDO SQL: Define a filter to select the correct batch job. Specify the start and end points for the log scan. Specify the recovery point. Specify attributes for the Backout Integrity report and the SQL output file. Save all selections in a work ID. Generate and execute the JCL.
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MySQL 5.7 Reference Manual :: 14.6.6 Redo Log
- https://dev.mysql.com/doc/refman/5.7/en/innodb-redo-log.html
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The redo log is a disk-based data structure used during crash recovery to correct data written by incomplete transactions. During normal operations, the ...
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Find redo log members / redo log file size / redo log status - deveshdba
- https://deveshdba.wordpress.com/2016/08/22/find-redo-log-members-redo-log-file-size-redo-log-status/
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To find redo log file size. SQL> select GROUP#,THREAD#,SEQUENCE#,bytes/1024/1024, MEMBERS,STATUS from v$log; GROUP# THREAD# SEQUENCE# BYTES/1024/1024 MEMBERS STATUS ---------- ---------- ---------- --------------- ---------- ---------------- 1 1 10 100 2 INACTIVE 2 1 11 100 2 INACTIVE 3 1 12 100 2 CURRENT
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MySQL 8.0 Reference Manual :: 15.6.5 Redo Log
- https://dev.mysql.com/doc/refman/8.0/en/innodb-redo-log.html
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By default, the redo log is physically represented on disk by two files named ib_logfile0 and ib_logfile1 . MySQL writes to the redo log files in a circular ...
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How to Manage Oracle Redo Logfiles
- https://oracle-dba-online.com/managing_redo_logfiles.htm
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To add a new Redo Logfile group to the database give the following command SQL>alter database add logfile group 3 ‘/u01/oracle/ica/log3.ora’ size 10M; Note: You can add groups to a database up to the MAXLOGFILES setting you have specified at the time of creating the database.
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Oracle Concepts - Redo Log Files
- http://www.dba-oracle.com/concepts/redo_log_files.htm
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Redo logs are transaction journals. Each transaction is recorded in the redo logs. Redo logs are used in a serial fashion with each transaction queuing up in ...
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MULTIPLEXING REDOLOG FILES - SQL DBA
- https://www.dbacentre.com/multiplexing-redolog-files/
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Redo log files are mainly used for recovering a database and also to ensure data commit. If a redo log file is lost, it will lead to data loss. To avoid this, we can maintain multiplexed copies of redo log files in different locations. These copies are together called as redo log group and individual files are called redo log members.
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Redo log content format tips - Burleson Consulting
- http://www.dba-oracle.com/t_redo_log_contents_text_sql_dml.htm
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"Redo log files are filled with redo records. A redo record, also called a redo entry, is made up of a group of change vectors, each of which is a description ...
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How to find redo log members/redo log file size/redo log status
- https://www.thegeekdiary.com/how-to-find-redo-log-members-redo-log-file-size-redo-log-status/
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Redo Logs consist of two or more pre-allocated files that store all changes made to the database as they occur. Every instance of an Oracle Database has ...
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Multiplexing the Redo Log Files - oracledistilled.com
- https://www.oracledistilled.com/oracle-database/administration/multiplexing-the-redo-log-files/
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Below is an example of creating a multiplexed redo log group with two members with ALTER DATABASE ADD LOGFILE GROUP. SQL> alter database 2 add logfile group 4 3 ('/u02/app/oracle/oradata/orcl/redo/redo04.log','/u03/app/oracle/oradata/orcl/redo/redo04_b.log') 4 size 50M; Database altered. SQL>
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