ADTPATH specifies the directory in which the database server saves audit files. Make sure that the directory that you specify has appropriate access privileges to prevent unauthorized use of audit records.
To change the ADTPATH value with onaudit, database server-managed auditing must be on.
For Extended Parallel Server, the path you specify must exist on each node that hosts a coserver. Audit files are stored locally on each coserver, as described in Location of Audit Files. The database server creates subdirectories for audit files in the path that you specify.