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Oracle hidden sort parameters
Don Burleson

 

Note: Oracle hidden parameters are undocumented and unsupported by Oracle.
Make sure that you thoroughly test all hidden parameters before placing them in your production environment.

Parameter Name                            Description
----------------------------------------- ---------------------------------------------------------
_sort_elimination_cost_ratio              cost ratio for sort eimination under first_rows mode
_sort_multiblock_read_count               multi-block read count for sort
_sort_space_for_write_buffers             tenths of sort_area_size devoted to direct write buffers
_sortmerge_inequality_join_off            turns off sort-merge join on inequality
_spin_count                               Amount to spin waiting for a latch
_sql_connect_capability_override          SQL Connect Capability Table Override
_sql_connect_capability_table             SQL Connect Capability Table (testing only)
_sqlexec_progression_cost                 sql execution progression monitoring cost threshold
 

 

 

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