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【12c新特性】CBO Optimizer优化器新特性列表
2024-08-26 05:37:56 点击量:

【12c新特性】CBO Optimizer新隐藏参数,以下Optimizer优化器新特性列表,通过对比 12c R1 和 11gR2的10053 trace中有影响的优化器参数获得:  

CLI_internal_cursor
PMO_altidx_rebuild
_adaptive_window_consolidator_enabled
_arch_comp_dbg_scan
_array_cdb_view_enabled
_bloom_filter_size
_bloom_predicate_offload
_bloom_rm_filter
_bloom_sm_enabled
_cell_materialize_all_expressions
_cell_materialize_virtual_columns
_cell_offload_complex_processing
_cell_offload_expressions
_cell_offload_sys_context
_common_data_view_enabled
_dbg_scan
_fast_index_maintenance
_hashops_prefetch_size
_long_varchar_allow_IOT
_multi_commit_global_index_maint
_oltp_comp_dbg_scan
_optimizer_adaptive_plans
_optimizer_ads_max_table_count
_optimizer_ads_time_limit
_optimizer_ads_use_result_cache
_optimizer_ansi_join_lateral_enhance
_optimizer_ansi_rearchitecture
_optimizer_batch_table_access_by_rowid
_optimizer_cluster_by_rowid
_optimizer_cluster_by_rowid_control
_optimizer_cube_join_enabled
_optimizer_dsdir_usage_control
_optimizer_gather_feedback
_optimizer_gather_stats_on_load
_optimizer_generate_transitive_pred
_optimizer_hybrid_fpwj_enabled
_optimizer_multi_table_outerjoin
_optimizer_null_accepting_semijoin
_optimizer_partial_join_eval
_optimizer_performance_feedback
_optimizer_proc_rate_level
_optimizer_proc_rate_source
_optimizer_strans_adaptive_pruning
_optimizer_unnest_scalar_sq
_optimizer_use_gtt_session_stats
_optimizer_use_histograms


本文转自maclean_007 51CTO博客,原文链接:http://blog.51cto.com/maclean/p2