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Oracle hidden olap 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
----------------------------------------- ----------------------------------------------------------------
_olap_aggregate_buffer_size               OLAP Aggregate max buffer size
_olap_aggregate_child_fragment_size       OLAP Aggregate child fragment size
_olap_aggregate_child_max_size            OLAP Aggregate child list max size
_olap_aggregate_flags                     OLAP Aggregate debug flags
_olap_aggregate_function_cache_enabled    OLAP Aggregate function cache enabler
_olap_aggregate_function_merge_threshold  OLAP Aggregate function merge threshold
_olap_aggregate_max_thread_tuples         OLAP Aggregate max thread tuples creation
_olap_aggregate_min_buffer_size           OLAP Aggregate min buffer size
_olap_aggregate_min_thread_status         OLAP Aggregate minimum cardinality of dimensions for thread
_olap_aggregate_multipath_hier            OLAP Aggregate Multi-path Hierarhies enabled
_olap_aggregate_statlen_thresh            OLAP Aggregate status array usage threshold
_olap_aggregate_store_probability         OLAP Aggregate function storeback probability
_olap_aggregate_work_per_thread           OLAP Aggregate max work parents
_olap_aggregate_worklist_max              OLAP Aggregate max worklists generated at once
_olap_allocate_errorlog_format            OLAP Allocate Errorlog Format
_olap_allocate_errorlog_header            OLAP Allocate Errorlog Header format
_olap_continuous_trace_file               Specify TRUE to enable continuous OLAP tracing - otherwise only
_olap_dimsave_restore_cache_values        OLAP Dimsave restores cached dimension values
_olap_eif_export_lob_size                 OLAP EIF Export BLOB size
_olap_parallel_update_threshold           OLAP parallel update threshold in pages
_olap_poutlog_echo_to_eventlog            OLAP POutLog copy output to event log (tracefile)
_olap_sort_buffer_size                    OLAP Sort Buffer Size



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