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Oracle: How to check if a database is in archivelog mode
Problem:
Before switching archivelog mode on or off, it can sometimes be useful to know if it's already on or off, especially since changing modes require a shutdown of the database.
 
Solution:
Using sqlplus, simply type
"archive log list"

Typical output when OFF:
Database log mode No Archive Mode
Automatic archival Enabled
Archive destination /oracle/app/oracle/oradata/RALEPH/archive
Oldest online log sequence 305
Current log sequence 307

Typical output when ON:
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /oracle/app/oracle/oradata/EXTENS/archive
Oldest online log sequence 193
Next log sequence to archive 195
Current log sequence 195


 
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