Oracle11g: Where’s My Alert Log?

Just a short blog entry about Oracle 11g.
One of the first things that caught me by surprise with 11g,
when I first started in the beta program, was that the default
location for the alert log has moved. It is still placed
under the traditional OFA structure, but not /u01/app/oracle/admin.
There is a new directory called diag that resides
in /u01/app/oracle as seen on one of my systems:


[oracle@oracle11gr1 ~]$ cd /u01/app/oracle/diag/rdbms/orcl/orcl
[oracle@oracle11gr1 orcl]$ ll
total 64
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 alert
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 cdump
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 hm
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 incident
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 incpkg
drwxr-x--- 2 oracle oinstall 4096 Jan 24 01:38 ir
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 lck
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 metadata
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 stage
drwxr-x--- 2 oracle oinstall 4096 Jan 9 13:23 sweep
drwxr-x--- 2 oracle oinstall 24576 Apr 19 15:33 trace

[oracle@oracle11gr1 orcl]$ cd trace
[oracle@oracle11gr1 trace]$ pwd
/u01/app/oracle/diag/rdbms/orcl/orcl/trace

[oracle@oracle11gr1 trace]$ ll alert_orcl.log
-rw-r----- 1 oracle oinstall 392 Apr 19 15:33 alert_orcl.log


In this case, my database is called orcl and the instance is orcl.

View : v$diag_info