Here listed down Top 33 Oracle Exadata Parameters, Exadata performance more over dependent on these parameters. It includes traditional database parameters also but those parameters also applied for Exadata environment and playing important role in terms of configuration and performance.
cell_offload_decryption
cell_offload_plan_display
cell_offload_processing
_cell_index_scan_enabled
_small_table_threshold
_serial_direct_read
_serial_direct_read
_kcfis_storageidx_disabled
_kcfis_storageidx_diag_mode
_cell_storidx_mode
_cell_storidx_minmax_enabled