ORA-00447: Fatal Error in Background Process — Causes, Fixes & Prevention ORA-00447 is one of Oracle's most severe errors, signaling that a critical failure has occurred within a background process such as PMON, SMON, LGWR, or DBWR. Unlike typical SQL errors, this error directly threatens instan...
Source: [Dev.to](https://dev.to/dbmserror/oracle-ora-00447-error-causes-and-solutions-complete-guide-3pal)