Name.................: _TRACE_FILES_PUBLIC Values...............: TRUE/FALSE Default value........: FALSE Initial Release......: ? Scope................: Instance
Trace files are not created with read permission by default for non-dba groups. Here is a sample on Linux:
$ ls -ltr total 4 -rw-r----- 1 oracle oinstall 2146 Jan 6 11:37 linkplus_ora_18653.trc
With _TRACE_FILES_PUBLIC=TRUE, other groups can read trace files.
$ ls -ltr total 8 -rw-r--r-- 1 oracle oinstall 2742 Jan 6 12:00 linkplus_ora_18759.trc
Setting this parameter to TRUE should be done for trusted users since trace files may include security data in BIND variables.
Oracle - Internals
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_TRACE_FILES_PUBLIC parameter