SQL> r
  1* select ksppinm, ksppdesc from x$ksppi where ksppinm like '%dde%'

KSPPINM                        KSPPDESC
------------------------------ ----------------------------------------------------------------------
_upddel_dba_hash_mask_bits     controls masking of lower order bits in DBA
_dde_flood_control_init        Initialize Flood Control at database open
_diag_dde_fc_enabled           Parameter to enable/disable Diag Flood Control
_diag_dde_fc_implicit_time     Override Implicit Error Flood Control time parameter
_diag_dde_fc_macro_time        Override Macro Error Flood Control time parameter
_diag_dde_inc_proc_delay       The minimum delay between two MMON incident sweeps (minutes)
_diag_dde_async_msgs           diag dde async actions: number of preallocated message buffers
_diag_dde_async_msg_capacity   diag dde async actions: message buffer capacity
_diag_dde_async_slaves         diag dde async actions: max number of concurrent slave processes
_diag_dde_async_mode           diag dde async actions: dispatch mode
_diag_dde_async_age_limit      diag dde async actions: message age limit (in seconds)
_diag_dde_async_process_rate   diag dde async actions: message processing rate - per loop
_diag_dde_async_runtime_limit  diag dde async actions: action runtime limit (in seconds)
_diag_dde_async_cputime_limit  diag dde async actions: action cputime limit (in seconds)
_diag_dde_enabled              enable DDE handling of critical errors

15 rows selected.