New initialization parameters in Oracle Database 19c

“_optimizer_gather_stats_on_conventional_dml” and “_optimizer_use_stats_on_conventional_dml” which are true by default
_optimizer_stats_on_conventional_dml_sample_rate (at 100%)
DATA_GUARD_MAX_IO_TIME
DATA_GUARD_MAX_LONGIO_TIME
ADG_REDIRECT_DML (TRUE or FALSE)
MAX_DATAPUMP_JOBS_PER_PDB
aws_pdb_autoflush_enabled (TRUE or FALSE)

Hariprasath Rajaram