An Oracle instance's system trace files are stored in the same directory as the alert log file, in the directory specified by the system parameter BACKGROUND_ DUMP_DEST. The system trace files contain debugging, status, and error messages for each of the background processes, such as SMON, PMON, DBWx, LGWR, and so forth.
System Trace File A text file that pertains to a single background process and contains status, debugging, or error information about that background process. System trace files are stored in the directory specified by the system parameter BACKGROUND_ DUMP_DEST.
Janice, the DBA, notices that there are quite a few system trace files in the BACKGROUND_DUMP_DEST directory:
She sees quite a few files for the DBW0 (database writer) background process, so she is concerned that there might be a problem with DBW0. She opens one of the DBW0 trace files, ord_dbw0_6181.trc, to see what the problem might be.
She looks at the contents of the file and realizes that most processes, including DBW0, generate a trace file at database startup. As a result, the trace file is merely informational in this case, and there appears to be nothing wrong with DBW0.
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Oracle Dba Tutorial
Relational Database Concepts
Sql*plus And Isql*plus Basics
Oracle Database Functions
Restricting, Sorting, And Grouping Data
Using Multiple Tables
Advanced Sql Queries
Installing Oracle And Creating A Database
Creating And Maintaining Database Objects
Users And Security
Making Things Run Fast (enough)
Saving Your Stuff (backups)
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