Oracle Internals
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Trace

Trace File Names

Foreground Processes
Background Processes

Foreground Processes

In Oracle 9.2 foreground process trace file names are in the following formats

Process Type Name
sid_ora_1234.trc Foreground process
sid_p000_1234.trc Parallel execution slave
sid_j000_1234.trc Job queue process
sid_d000_1234.trc Dispatcher process
sid_s000_1234.trc Shared server process

These trace files are written to the USER_DUMP_DEST directory

Background Processes

In Oracle 9.2 background process trace file names are in the format 

    sid_processname_1234.trc

where processname is one of

ARC0 ARC7 DBW2 DBW9 DBWg FMON LMS2 LMS9 QMN0 QMN7
ARC1 ARC8 DBW3 DBWa DBWh LCK0 LMS3 LNSV QMN1 QMN8
ARC2 ARC9 DBW4 DBWb DBWi LGWR LMS4 LSP0 QMN2 QMN9
ARC3 CJQ0 DBW5 DBWc DBWj LMD0 LMS5 LSP1 QMN3 RECO
ARC4 CKPT DBW6 DBWd DIAG LMON LMS6 MRP0 QMN4 RSM0
ARC5 DBW0 DBW7 DBWe DMON LMS0 LMS7 NSV0 QMN5 SMON
ARC6 DBW1 DBW8 DBWf EMN0 LMS1 LMS8 PMON QMN6  

These trace file are written to the BACKGROUND_DUMP_DEST directory