redo log size in oracle 11g

redo log size in oracle 11g

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Oracle 11g Resize Redo Log Size on Data Guard and Primary ...

    https://doyensys.com/blogs/oracle-11g-resize-redo-log-size-on-data-guard-and-primary-database/
    Oracle 11g Resize Redo Log Size on Data Guard and Primary Database - Doyensys Blog Oracle 11g Resize Redo Log Size on Data Guard and Primary Database Current Status Of Redo Logs Primary Side SQL> select group#,sum (bytes/1024/1024)”Size in MB” from v$log group by group#; GROUP# Size in MB ——- ———- 1 750 2 750 3 750
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    https://doyensys.com/blogs/oracle-11g-resize-redo-log-size-on-data-guard-and-primary-database/

6 Managing the Redo Log - Oracle Help Center

    https://docs.oracle.com/cd/B19306_01/server.102/b14231/onlineredo.htm
    The minimum size permitted for a redo log file is 4 MB. See Also: Your operating system–specific Oracle documentation. The default size of redo log files is ...
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    https://docs.oracle.com/cd/B19306_01/server.102/b14231/onlineredo.htm

logging - Oracle 11g Redo Log size - Stack Overflow

    https://stackoverflow.com/questions/43772544/oracle-11g-redo-log-size
    The redo log buffer is flushed every 3 seconds, when 1/3 full, or when you commit. Oracle will write the buffer to the redo logs and they will switch when full. You will have to set your redo log size high enough so that you don't get switches too often. Getting a switch every few minutes on a busy production system is acceptable.
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    https://stackoverflow.com/questions/43772544/oracle-11g-redo-log-size

12 Managing the Redo Log - Oracle Help Center

    https://docs.oracle.com/cd/E11882_01/server.112/e25494/onlineredo.htm
    Beginning with Oracle Database 11 g Release 2, you can specify the block size of online redo log files with the BLOCKSIZE keyword in the CREATE DATABASE, ALTER DATABASE, and CREATE CONTROLFILE statements. The permissible block sizes are 512, 1024, and 4096. The following statement adds a redo log file group with a block size of 512B.
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    https://docs.oracle.com/cd/E11882_01/server.112/e25494/onlineredo.htm

Find redo log members / redo log file size / redo log status

    https://deveshdba.wordpress.com/2016/08/22/find-redo-log-members-redo-log-file-size-redo-log-status/
    Aug 22, 2016 — Find redo log members / redo log file size / redo log status. Find redo log file members. SQL> col member format a50 SQL> select GROUP#,TYPE, ...
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    https://deveshdba.wordpress.com/2016/08/22/find-redo-log-members-redo-log-file-size-redo-log-status/

Planning the Redo Log - Oracle Help Center

    https://docs.oracle.com/cd/E18283_01/server.112/e17120/onlineredo002.htm
    The minimum size permitted for a redo log file is 4 MB. See Also: Your operating system–specific Oracle documentation. The default size of redo log files is ...
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    https://docs.oracle.com/cd/E18283_01/server.112/e17120/onlineredo002.htm

Online Redo Log Files Size

    https://docs.oracle.com/cd/E57185_01/HFMAD/apbs09s06s02.html
    Hundreds of MB is a normal size for Financial Management databases. But the preferred way to determine the size of redo log files is to enable ...
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    https://docs.oracle.com/cd/E57185_01/HFMAD/apbs09s06s02.html

How to Determine If the Oracle Redo Log File Size Is a Problem

    https://logicalread.com/oracle-11g-redo-log-file-size-is-problem-mc02/
    Here is another query that you can try that will tell you how may log switches per hour and per day. You will need to ‘alter session set nls_date_format = ‘mm/dd/yy hh24′ before you run it: WITH row_source AS ( select trunc (first_time) DAY, trunc (first_time,’HH24′) DAY_HOUR, count (*) LOG_SWITCHES_PER_HOUR from v$log_history
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    https://logicalread.com/oracle-11g-redo-log-file-size-is-problem-mc02/

Find Redo Log Size / Switch Frequency / Location in Oracle

    https://orahow.com/find-redo-log-size-switch-frequency-location/
    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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    https://orahow.com/find-redo-log-size-switch-frequency-location/

What Is the Redo Log?

    https://docs.oracle.com/cd/E18283_01/server.112/e17120/onlineredo001.htm
    The most crucial structure for recovery operations is the redo log, which consists of two or more preallocated files that store all changes made to the ...
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    https://docs.oracle.com/cd/E18283_01/server.112/e17120/onlineredo001.htm

How to Resize Redo Logs in Oracle - Ed Chen Logic

    https://logic.edchen.org/how-to-resize-redo-logs-in-oracle/
    Here in this post, I will show you how to resize redo logs from 50MB to 1GB step by step. Check Current Redo Logs Add 3 Groups with New Size (1GB) Switch Logfile to New Groups Force a CheckPoint Drop Group 1, 2, 3 Remove Redo Log Files Add Group 1, 2, 3 with New Size (1GB) Switch Logfile Several Times Check Status of All Redo Logs
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    https://logic.edchen.org/how-to-resize-redo-logs-in-oracle/

Oracle redo size

    http://www.dba-oracle.com/m_redo_size.htm
    The redo size Oracle metric is t he total amount of redo generated in bytes. Mark Rittman notes on redo log sizing says that increasing REDO Log size and log_buffer parameter will reduce log switch waits and improve overall time for OLAP operations. This complex query will show redo size by time period: col begin_interval_time format a30
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    http://www.dba-oracle.com/m_redo_size.htm

Why and how to increase Oracle redo log size using RSA ...

    https://community.rsa.com/docs/DOC-97456
    Apr 23, 2021 — By default, an Oracle database is configured with three redo logs of 50 MB each. · RSA Identity Governance & Lifecycle requires six redo logs of ...
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    https://community.rsa.com/docs/DOC-97456

How do I find out the "redo log file max size" in Oracle 11R2

    https://dba.stackexchange.com/questions/21805/how-do-i-find-out-the-redo-log-file-max-size-in-oracle-11r2
    If you want the size of the redo log members (files on disk) size, then use the query below: -- Show Redo Logs info set linesize 300 column ...
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    https://dba.stackexchange.com/questions/21805/how-do-i-find-out-the-redo-log-file-max-size-in-oracle-11r2

Redo Log recommended size — oracle-tech

    https://community.oracle.com/tech/developers/discussion/2309369/redo-log-recommended-size
    I would recommend changing the redolog size to 1 or 2GB. 500MB is somewhat very smallish for a database that's of ~800gb. So about 2-3gb of the redo log file size should be a good start. But please note that just setting the redo logfile size to X value might not solve the issue.
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