What is archive log mode in Oracle?

Posted on by Muna Meyer

What is archive log mode in Oracle?

Oracle Database lets you save filled groups of redo log files to one or more offline destinations, known collectively as the archived redo log, or more simply the archive log. The process of turning redo log files into archived redo log files is called archiving. You can choose automatic or manual archiving.

How do I know if archive logs are applied to standby database?

When querying the v$archived_log view for log_archive_dest_2 we can check what files are applied on the standby:

  1. select dest_id , sequence# , applied.
  2. from v$archived_log.
  3. where dest_id = 2.
  4. and sequence# > ( select max(sequence#) – 10 from v$archived_log )
  5. order by sequence#
  6. /
  7. DEST_ID SEQUENCE# APPLIED.

How do I view archive log mode?

Checking ARCHIVELOG mode status

  1. Log in as OS user oracle and enter the following commands: $ export ORACLE_SID= where is the name of the database $ sqlplus /nolog SQL> connect / as sysdba.
  2. To check the ARCHIVELOG mode status, enter the following SQL command: SQL> archive log list;

How do I know if my archive log is full?

log archive destination full tips

  1. Issue the archive log list command: SQL> archive log list.
  2. Issue the show parameter command: SQL> show parameter db_recovery_file_dest.
  3. Query the v$archive_dest view: SQL> select dest_name, status, destination from v$archive_dest;

How do I view archive logs?

The following commands can be used to locate the Oracle archive logs:

  1. Issue the archive log list command: SQL> archive log list.
  2. Issue the show parameter command: SQL> show parameter db_recovery_file_dest.
  3. Query the v$archive_dest view: SQL> select dest_name, status, destination from v$archive_dest;

How can I see when my last archive was applied?

Check Status of generated, Received & Applied Archive log in Oracle Dataguard

  1. Check the Generated archive log in Primary Database. –Run on Primary Server:
  2. Check the Received status of archive log at Standby Server. –Run on Standby Server:
  3. Check the applied status of archive log on Standby server. –Run on Standby Server:

How do I turn off Archivelog mode?

You can disable automatic archiving of filled redo log files by setting the LOG_ARCHIVE_START initialization parameter to FALSE. Specify LOG_ARCHIVE_START=FALSE in the initialization parameter file and restart your instance.

How to check archivelog mode in Oracle?

Limited Space

  • For Development or Testing
  • Empty Databases

    • How to enable archivelog?

    Connect Oracle Recovery Manager (RMAN) to the target database as described in ” Connecting to the Target Database Using RMAN .”

  • Shut down the database.
  • Back up the database.
  • Start the instance and mount the database (do not open the database).

    • How to configure Oracle database in archivelog mode?

    There are 2 types of logging mode in oracle database. 1. Archivelog mode. In this mode, after the online redo logs are filled , it will move to archive location. 2. Noarchivelog mode. In this mode, filled online redo logs wont be archives, instead they will be overwritten. Enable archive log mode:

    How to enable archivelog mode in Oracle 9i?

    Location of the archive log files (in this case the archive logs are not mirrored)

  • The log_archive_dest_state_1 allows control over the availability state of the specified destination (1).
  • The archive logging is started.