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Don Burleson Blog 







log archive destination full tips

Oracle Database Tips by Donald BurlesonFebruary 27, 2016

Question: What do I do when my instance loks up due to the log archive destination getting full?  I see this message, indicating that the diectory is full:

archive log full waiting to be freed

How can I fix the log archive destination full, and more important, how do I prevent this from happening? 

Answer:  Most Oracle shops use a crontab task to monitor the log archive destination to see when it crosses 90% full, and then invokes a solution that deletes the oldestredo logs from the directory.  This Linux/UNIX command will remove all archoved redo logs that are more than two weeks old:

root> cd <redo log directory>
root> find -name '*.log' -mtime +140 -exec rm -rf {} \;

You can also fix this full problem by adding space to your archived redo log directory. 

Here is a UNIX/Linux cron job that is handy for removing "clutter" (obsolete archived redo log files) from external Oracle filesystems:

# Cleanup PROD archive logs more than 3 days old
/usr/bin/find /u01/app/oracle/admin/PROD/arch/arch_prod*.arc -ctime +3 -exec rm {} \;

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

  •  Issue the archive log list command:

       SQL> archive log list
  • Issue the show parameter command:

       SQL> show parameter db_recovery_file_dest
  • Query the v$archive_dest view:

       SQL> select dest_name, status, destination from v$archive_dest;  

If you are using RMAN you can issue these commands when the archived redo log diectlory becomes full:

run {
crosscheck archivelog all;
crosscheck backup;
delete noprompt obsolete;
delete noprompt expired archivelog all;
delete noprompt expired backup;

For full scripts to monitor and remove archived redo logs, see the book "Oracle Shell Scripting" by Jon Emmons.

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