11g從記憶體建立引數檔案

 

11g從記憶體建立引數檔案

 

 

==================

 

新特性
過去引數檔案丟了只能從alert日誌裡找
或者在資料庫中列出所有引數來重建引數檔案

 

11g中支援存記憶體中建立引數檔案
應對引數檔案丟失的情況

 

 

--測試版本

 

SQL> select * from v$version;

BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE    11.2.0.1.0      Production
TNS for Linux: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production

 

--目前使用的是spfile

 

SQL> show parameter spfile

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
spfile                               string      /opt/app/oracle/product/11.1.0
                                                 /db_1/dbs/spfiledb11.ora

 

--使用命令
--從記憶體中建立引數檔案

 

SQL> create spfile='/tmp/spfile.ora' from memory;

File created.

SQL> create pfile ='/tmp/pfile.ora' from memory;

File created.

 

 

--具體引數的值

 

SQL> host more /tmp/pfile.ora
# Oracle init.ora parameter file generated by instance db11 on 11/15/2011 17:18:58
__db_cache_size=108M
__java_pool_size=4M
__large_pool_size=4M
__oracle_base='/opt/app/oracle' # ORACLE_BASE set from environment
__pga_aggregate_target=100M
__sga_target=300M
__shared_io_pool_size=0
__shared_pool_size=176M
__streams_pool_size=0
_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='/opt/app/oracle/admin/db11/adump'
audit_trail='DB'
compatible='11.2.0.0.0'
control_files='/oracle/oradata/db11/db11/control01.ctl'
control_files='/oracle/oradata/db11/db11/control02.ctl'
core_dump_dest='/opt/app/oracle/diag/rdbms/db11/db11/cdump'
db_block_size=8192
db_domain=''
db_name='db11'
db_recovery_file_dest='/oracle/flash_recovery_area'
db_recovery_file_dest_size=5G
diagnostic_dest='/opt/app/oracle'
dispatchers='(PROTOCOL=TCP) (SERVICE=db11XDB)'
log_buffer=6135808 # log buffer update
memory_max_target=500M
memory_target=400M
nls_language='AMERICAN'
open_cursors=300
optimizer_dynamic_sampling=2
optimizer_mode='ALL_ROWS'
pga_aggregate_target=80M
plsql_warnings='DISABLE:ALL' # PL/SQL warnings at init.ora
processes=1000
query_rewrite_enabled='TRUE'
remote_login_passwordfile='EXCLUSIVE'
result_cache_max_size=544K
sessions=1522
sga_max_size=300M # internally adjusted
sga_target=300M
shared_pool_size=52M
skip_unusable_indexes=TRUE
undo_tablespace='UNDOTBS1'