ORA-00800: soft external error

oerr ora 00800
00800, 00000, "soft external error, arguments: [%s], [%s], [%s], [%s], [%s]"
// *Cause:  An improper system configuration or setting resulted in failure.
//          This failure is not fatal to the instance at the moment, however, this might result
//          in an unexpected behavior during query execution.
// *Action: Check the database trace files and rectify system settings or the configuration.
//          For additional information, refer to Oracle database documentation or refer to
//          My Oracle Support (MOS) notes.

ORA-00800: soft external error

SQL> show parameter _high_priority_processes

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
_high_priority_processes             string      LMS*|VKTM|DBW*|LGWR

Oracle Database process scheduling policy priority , Increase process running priority .