Show the implicit parameter for each instance.

Some one said the implicit parameters have been change by accident.

We need to find if they are right.

One of the parameter is parameter _optim_peek_user_bind.

But because it is implicit paramete we can not find the value in common way.

SQL> show parameter optimizer

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
optimizer_capture_sql_plan_baselines boolean FALSE
optimizer_dynamic_sampling integer 2
optimizer_features_enable string 11.2.0.1
optimizer_index_caching integer 0
optimizer_index_cost_adj integer 100
optimizer_mode string ALL_ROWS
optimizer_secure_view_merging boolean TRUE
optimizer_use_invisible_indexes boolean FALSE
optimizer_use_pending_statistics boolean FALSE
optimizer_use_sql_plan_baselines boolean TRUE

SQL> show parameter _optim

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
object_cache_optimal_size integer 102400
plsql_optimize_level integer 2
SQL> show parameter _optim_peek_user_bind
SQL> create pfile="c:/pfile" from memory;
create pfile="c:/pfile" from memory
*
第 1 行出现错误:
ORA-02236: 文件名无效


SQL> create pfile='c:/pfile' from memory;

文件已创建。

SQL>exit

notepad c:/pfile

We can list all the parameters.

# Oracle init.ora parameter file generated by instance orcl on 12/20/2010 12:47:21
__db_cache_size=192M
__java_pool_size=4M
__large_pool_size=4M
__oracle_base='E:/app/Henrybaiwentao' # ORACLE_BASE set from environment
__pga_aggregate_target=308M
__sga_target=512M
__shared_io_pool_size=0
__shared_pool_size=300M
__streams_pool_size=4M
_aggregation_optimization_settings=0
_always_anti_join='CHOOSE'
_always_semi_join='CHOOSE'
_and_pruning_enabled=TRUE
_b_tree_bitmap_plans=TRUE
_bloom_filter_enabled=TRUE
_bloom_folding_enabled=TRUE
_bloom_pruning_enabled=TRUE
_complex_view_merging=TRUE
_compression_compatibility='11.2.0.0.0'
_connect_by_use_union_all='TRUE'
_convert_set_to_join=FALSE
_cost_equality_semi_join=TRUE
_cpu_to_io=0
_dimension_skip_null=TRUE
_eliminate_common_subexpr=TRUE
_enable_type_dep_selectivity=TRUE
_fast_full_scan_enabled=TRUE
_first_k_rows_dynamic_proration=TRUE
_gby_hash_aggregation_enabled=TRUE
_generalized_pruning_enabled=TRUE
_globalindex_pnum_filter_enabled=TRUE
_gs_anti_semi_join_allowed=TRUE
_improved_outerjoin_card=TRUE
_improved_row_length_enabled=TRUE
_index_join_enabled=TRUE
_ksb_restart_policy_times='0'
_ksb_restart_policy_times='60'
_ksb_restart_policy_times='120'
_ksb_restart_policy_times='240' # internal update to set default
_left_nested_loops_random=TRUE
_local_communication_costing_enabled=TRUE
_minimal_stats_aggregation=TRUE
_mmv_query_rewrite_enabled=TRUE
_new_initial_join_orders=TRUE
_new_sort_cost_estimate=TRUE
_nlj_batching_enabled=1
_optim_adjust_for_part_skews=TRUE
_optim_enhance_nnull_detection=TRUE
_optim_new_default_join_sel=TRUE
_optim_peek_user_binds=TRUE
_optimizer_adaptive_cursor_sharing=TRUE
_optimizer_better_inlist_costing='ALL'
_optimizer_cbqt_no_size_restriction=TRUE
_optimizer_coalesce_subqueries=TRUE
_optimizer_complex_pred_selectivity=TRUE
_optimizer_compute_index_stats=TRUE
_optimizer_connect_by_combine_sw=TRUE
_optimizer_connect_by_cost_based=TRUE
_optimizer_connect_by_elim_dups=TRUE
_optimizer_correct_sq_selectivity=TRUE
_optimizer_cost_based_transformation='LINEAR'
_optimizer_cost_hjsmj_multimatch=TRUE
_optimizer_cost_model='CHOOSE'
_optimizer_dim_subq_join_sel=TRUE
_optimizer_distinct_agg_transform=TRUE
_optimizer_distinct_elimination=TRUE
_optimizer_distinct_placement=TRUE
_optimizer_eliminate_filtering_join=TRUE
_optimizer_enable_density_improvements=TRUE
_optimizer_enable_extended_stats=TRUE
_optimizer_enhanced_filter_push=TRUE
_optimizer_extend_jppd_view_types=TRUE
_optimizer_extended_cursor_sharing='UDO'
_optimizer_extended_cursor_sharing_rel='SIMPLE'
_optimizer_extended_stats_usage_control=224
_optimizer_fast_access_pred_analysis=TRUE
_optimizer_fast_pred_transitivity=TRUE
_optimizer_filter_pred_pullup=TRUE
_optimizer_fkr_index_cost_bias=10
_optimizer_group_by_placement=TRUE
_optimizer_improve_selectivity=TRUE
_optimizer_join_elimination_enabled=TRUE
_optimizer_join_factorization=TRUE
_optimizer_join_order_control=3
_optimizer_join_sel_sanity_check=TRUE
_optimizer_max_permutations=2000
_optimizer_mode_force=TRUE
_optimizer_multi_level_push_pred=TRUE
_optimizer_native_full_outer_join='FORCE'
_optimizer_new_join_card_computation=TRUE
_optimizer_null_aware_antijoin=TRUE
_optimizer_or_expansion='DEPTH'
_optimizer_order_by_elimination_enabled=TRUE
_optimizer_outer_to_anti_enabled=TRUE
_optimizer_push_down_distinct=0
_optimizer_push_pred_cost_based=TRUE
_optimizer_rownum_bind_default=10
_optimizer_rownum_pred_based_fkr=TRUE
_optimizer_skip_scan_enabled=TRUE
_optimizer_sortmerge_join_inequality=TRUE
_optimizer_squ_bottomup=TRUE
_optimizer_star_tran_in_with_clause=TRUE
_optimizer_system_stats_usage=TRUE
_optimizer_table_expansion=TRUE
_optimizer_transitivity_retain=TRUE
_optimizer_try_st_before_jppd=TRUE
_optimizer_undo_cost_change='11.2.0.1'
_optimizer_unnest_corr_set_subq=TRUE
_optimizer_unnest_disjunctive_subq=TRUE
_optimizer_use_cbqt_star_transformation=TRUE
_optimizer_use_feedback=TRUE
_or_expand_nvl_predicate=TRUE
_ordered_nested_loop=TRUE
_parallel_broadcast_enabled=TRUE
_partition_view_enabled=TRUE
_pivot_implementation_method='CHOOSE'
_pre_rewrite_push_pred=TRUE
_pred_move_around=TRUE
_push_join_predicate=TRUE
_push_join_union_view=TRUE
_push_join_union_view2=TRUE
_px_minus_intersect=TRUE
_px_pwg_enabled=TRUE
_px_ual_serial_input=TRUE
_query_rewrite_setopgrw_enable=TRUE
_remove_aggr_subquery=TRUE
_replace_virtual_columns=TRUE
_right_outer_hash_enable=TRUE
_selfjoin_mv_duplicates=TRUE
_sql_model_unfold_forloops='RUN_TIME'
_sqltune_category_parsed='DEFAULT' # parsed sqltune_category
_subquery_pruning_enabled=TRUE
_subquery_pruning_mv_enabled=FALSE
_table_scan_cost_plus_one=TRUE
_union_rewrite_for_gs='YES_GSET_MVS'
_unnest_subquery=TRUE
_use_column_stats_for_function=TRUE
audit_file_dest='E:/APP/HENRYBAIWENTAO/ADMIN/ORCL/ADUMP'
audit_trail='DB'
compatible='11.2.0.0.0'
control_files='E:/APP/HENRYBAIWENTAO/ORADATA/ORCL/CONTROL01.CTL'
control_files='E:/APP/HENRYBAIWENTAO/FLASH_RECOVERY_AREA/ORCL/CONTROL02.CTL'
core_dump_dest='e:/app/henrybaiwentao/diag/rdbms/orcl/orcl/cdump'
db_block_size=8192
db_domain='oracle.com'
db_name='orcl'
db_recovery_file_dest='E:/app/Henrybaiwentao/flash_recovery_area'
db_recovery_file_dest_size=3852M
diagnostic_dest='E:/APP/HENRYBAIWENTAO'
dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
local_listener='LISTENER_ORCL'
log_buffer=5611520 # log buffer update
memory_target=820M
open_cursors=300
optimizer_dynamic_sampling=2
optimizer_mode='CHOOSE'
plsql_warnings='DISABLE:ALL' # PL/SQL warnings at init.ora
processes=150
query_rewrite_enabled='TRUE'
remote_login_passwordfile='EXCLUSIVE'
resource_manager_plan=''
result_cache_max_size=2112K
skip_unusable_indexes=TRUE
undo_tablespace='UNDOTBS1'