Posts Tagged ‘Check Oracle Archived Redo Log’

Database Log Switch Intervals

December 4th, 2017, posted in Oracle Queries
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Oracle Database Log Switch Intervals :

 

Hourly Log Switch breakdown :

 

SELECT * FROM (
SELECT * FROM (
SELECT   TO_CHAR(FIRST_TIME, 'DD/MM') AS "DAY"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '00', 1, 0)), '99') "00:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '01', 1, 0)), '99') "01:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '02', 1, 0)), '99') "02:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '03', 1, 0)), '99') "03:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '04', 1, 0)), '99') "04:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '05', 1, 0)), '99') "05:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '06', 1, 0)), '99') "06:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '07', 1, 0)), '99') "07:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '08', 1, 0)), '99') "08:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '09', 1, 0)), '99') "09:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '10', 1, 0)), '99') "10:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '11', 1, 0)), '99') "11:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '12', 1, 0)), '99') "12:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '13', 1, 0)), '99') "13:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '14', 1, 0)), '99') "14:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '15', 1, 0)), '99') "15:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '16', 1, 0)), '99') "16:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '17', 1, 0)), '99') "17:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '18', 1, 0)), '99') "18:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '19', 1, 0)), '99') "19:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '20', 1, 0)), '99') "20:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '21', 1, 0)), '99') "21:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '22', 1, 0)), '99') "22:00"
       , TO_CHAR(SUM(DECODE(TO_CHAR(FIRST_TIME, 'HH24'), '23', 1, 0)), '99') "23:00"
    FROM V$LOG_HISTORY
    WHERE extract(year FROM FIRST_TIME) = extract(year FROM sysdate)
GROUP BY TO_CHAR(FIRST_TIME, 'DD/MM')
) ORDER BY TO_DATE(extract(year FROM sysdate) || DAY, 'YYYY DD/MM') DESC
) WHERE ROWNUM < 30
/

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Oracle Database-Archive Log Sizes Spooled

November 25th, 2017, posted in Oracle Queries
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1) Info on archived logs spooled/deleted during the past 24 hours

2) Info on archived logs spooled/deleted during the previous 7 days

3) Info on archived logs spooled/deleted during the previous 31 days

 

1) Info on archived logs spooled/deleted during the past 24 hours:


SELECT SUM_ARCH.DAY,
 SUM_ARCH.GENERATED_MB,
 SUM_ARCH_DEL.DELETED_MB,
 SUM_ARCH.GENERATED_MB - SUM_ARCH_DEL.DELETED_MB "REMAINING_MB"
 FROM ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 GENERATED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES'
 AND COMPLETION_TIME >SYSDATE-1
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH,
 ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 DELETED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES' AND DELETED = 'YES'
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH_DEL
 WHERE SUM_ARCH.DAY = SUM_ARCH_DEL.DAY(+)
 ORDER BY TO_DATE (DAY, 'DD/MM/YYYY');

 

 

2) Info on archived logs spooled/deleted during the previous 7 days:

SELECT SUM_ARCH.DAY,
 SUM_ARCH.GENERATED_MB,
 SUM_ARCH_DEL.DELETED_MB,
 SUM_ARCH.GENERATED_MB - SUM_ARCH_DEL.DELETED_MB "REMAINING_MB"
 FROM ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 GENERATED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES'
 AND COMPLETION_TIME >SYSDATE-7
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH,
 ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 DELETED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES' AND DELETED = 'YES'
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH_DEL
 WHERE SUM_ARCH.DAY = SUM_ARCH_DEL.DAY(+)
 ORDER BY TO_DATE (DAY, 'DD/MM/YYYY');

 

3) Info on archived logs spooled/deleted during the past 31 days:

SELECT SUM_ARCH.DAY,
 SUM_ARCH.GENERATED_MB,
 SUM_ARCH_DEL.DELETED_MB,
 SUM_ARCH.GENERATED_MB - SUM_ARCH_DEL.DELETED_MB "REMAINING_MB"
 FROM ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 GENERATED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES'
 AND COMPLETION_TIME >SYSDATE-31
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH,
 ( SELECT TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY') DAY,
 SUM (ROUND ( (blocks * block_size) / (1024 * 1024), 2))
 DELETED_MB
 FROM V$ARCHIVED_LOG
 WHERE ARCHIVED = 'YES' AND DELETED = 'YES'
 GROUP BY TO_CHAR (COMPLETION_TIME, 'DD/MM/YYYY')) SUM_ARCH_DEL
 WHERE SUM_ARCH.DAY = SUM_ARCH_DEL.DAY(+)
 ORDER BY TO_DATE (DAY, 'DD/MM/YYYY');

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Check Oracle Archived Redo Log

May 14th, 2015, posted in Oracle Queries
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Archive logging is essential for production databases where the loss of a transaction might be fatal. It is generally considered unnecessary in development and test environments.

To check if the ARCHIVELOG mode is enabled

  1. Log into Oracle server as an Oracle user with SYSDBA equivalent privileges.
  2. Enter the following command at the SQL*Plus prompt:
    ARCHIVE LOG LIST;

 

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To see the current archiving mode, query the V$DATABASE view:

SELECT LOG_MODE FROM SYS.V$DATABASE;

LOG_MODE
------------
ARCHIVELOG


The SQL*Plus command ARCHIVE LOG LIST displays archiving information for the connected instance. For example:

SQL> ARCHIVE LOG LIST

Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            D:oracleoradataIDDB2archive
Oldest online log sequence     11160
Next log sequence to archive   11163
Current log sequence           11163

This display tells you all the necessary information regarding the archived redo log settings for the current instance:

  • The database is currently operating in ARCHIVELOG mode.
  • Automatic archiving is enabled.
  • The archived redo log destination is D:oracleoradataIDDB2archive.
  • The oldest filled redo log group has a sequence number of 11160.
  • The next filled redo log group to archive has a sequence number of 11163.
  • The current redo log file has a sequence number of 11163.

 

You can also run this UNIX/Linux/Solairs command to see if you are running in archivelog mode.  If you are in ARCHIVELOG mode, you will see rows returned by this ps command:

$ ps -ef|grep -i _arc

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Links :
http://www.dba-oracle.com/t_check_if_running_in_archivelog_mode.htm
http://docs.oracle.com/cd/B28359_01/server.111/b28310/archredo008.htm#ADMIN11355
http://psoug.org/reference/archivelog.html
https://support.ca.com/cadocs/0/CA%20ARCserve%20%20Backup%20r16-ENU/Bookshelf_Files/HTML/oraclewn/index.htm?toc.htm?ow_check_archivelog_mode.htm

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