About
Trace File are trace (or dump) file that Oracle Database creates to help you diagnose and resolve operating problems.
Each server and background process writes to a trace file. When a process detects an internal error, it writes information about the error to its trace file.
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Linux File Format
The file name format of a trace file is sid_processname_unixpid.trc, where:
- sid is the instance system identifier
- processname is a three or four-character abbreviated process name identifying the Oracle Database process that generated the file (for example: pmon, dbwr, ora, or reco)
- unixpid is the operating system process ID number
The following is a sample trace file name:
$ORACLE_BASE/diag/rdbms/mydb/mydb/trace/test_lgwr_1237.trc
where ORACLE_BASE is the Oracle Base Directory
How to
Format it
SQL Developer
To see a formatted display of a SQL Trace file, drag the *.trc file onto the area above the SQL Worksheet (or open it by clicking File, then Open).
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Configuration
MAX_DUMP_FILE
Set the MAX_DUMP_FILE initialization parameter to at least 5000, to ensure that the trace file is large enough to store error information.