|Default value||Derived from the value of
|Real Application Clusters||This parameter can be set on each instance. Oracle recommends that each instance in a cluster specify a
As of Oracle Database 11g Release 1, the diagnostics for each database instance are located in a dedicated directory, which can be specified through the
DIAGNOSTIC_DEST initialization parameter. The structure of the directory specified by
DIAGNOSTIC_DEST is as follows:
This location is known as the Automatic Diagnostic Repository (ADR) Home. For example, if the database name is
proddb and the instance name is
proddb1, the ADR home directory would be
The following files are located under the ADR home directory:
Trace files - located in subdirectory
Alert logs - located in subdirectory
<adr-home>/alert. In addition, the
alert.log file is now in XML format, which conforms to the Oracle ARB logging standard.
Core files - located in the subdirectory
Incident files - the occurrence of each serious error (for example, ORA-600, ORA-1578, ORA-7445) causes an incident to be created. Each incident is assigned an ID and dumping for each incident (error stack, call stack, block dumps, and so on) is stored in its own file, separated from process trace files. Incident dump files are located in
<adr-home>/incident/<incdir#>. You can find the incident dump file location inside the process trace file.