PARALLEL_EXECUTION_MESSAGE_SIZE

Specifies the size of messages for parallel execution (formerly referred to as parallel query, PDML, Parallel Recovery, and replication).

PARALLEL_MAX_

SERVERS 

Specifies the maximum number of parallel execution processes and parallel recovery processes for an instance.

REMOTE_LOGIN_

PASSWORDFILE

Specifies whether Oracle checks for a password file and how many databases can use the password file.

ROW_LOCKING

Specifies whether row locks are acquired during update operations.

SPFILE

The value of this parameter is the name of the current server parameter file (SPFILE) in use. This parameter can be defined in a client side PFILE to indicate the name of the server parameter file to use.

TRACE_ENABLED 

Controls tracing of the execution history, or code path; Oracle Support Services uses this information for debugging. When trace_enabled is set to true, Oracle records information in specific files when errors occur.

UNDO_MANAGEMENT

Specifies which undo space management mode the system should use. When set to AUTO, the instance starts in automatic undo management mode. In manual undo management mode, undo space is allocated externally as rollback segments.

UNDO_RETENTION

Specifies (in seconds) the amount of committed undo information to retain in the database. You can use undo_retention to satisfy queries that require old undo information in order to rollback changes to produce older images of data blocks. You can set the value at instance startup.