ASM例項使用CREATE PFILE FROM MEMORY的bug

Oracle 11g增加了CREATE PFILE FROM MEMORY命令，這個命令可以方便的將當前例項設定的初始化引數寫入初始化引數檔案中，不過這個命令對於ASM例項而言，還存在bug。

 

 

11g ASM環境的Oracle就可以透過下面了例子再現這個錯誤：

bash-3.00$ export ORACLE_SID=+ASM1
bash-3.00$ sqlplus "/ as sysdba"

SQL*Plus: Release 11.1.0.6.0 - Production on 星期日 6月 14 20:20:04 2009

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

連線到:
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP, Data Mining
and Real Application Testing options

SQL> set pages 100 lines 120
SQL> create pfile = '/export/home/oracle/init+ASM1.ora' from memory;

File created.

SQL> shutdown immediate
ASM diskgroups dismounted
ASM instance shutdown
SQL> startup pfile=/export/home/oracle/init+ASM1.ora
ORA-15021: parameter "plsql_warnings" is not valid in asm instance

檢查Oracle生成的PFILE檔案：

SQL> host more /export/home/oracle/init+ASM1.ora
# Oracle init.ora parameter file generated by instance +ASM1 on 06/14/2009 20:21:43
*.__oracle_base='/data/oracle' # ORACLE_BASE set from environment
*._always_anti_join='CHOOSE'
*._always_semi_join='CHOOSE'
*._b_tree_bitmap_plans=TRUE
*._bloom_filter_enabled=TRUE
*._bloom_pruning_enabled=TRUE
*._complex_view_merging=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_complex_pred_selectivity=TRUE
*._optimizer_compute_index_stats=TRUE
*._optimizer_connect_by_combine_sw=TRUE
*._optimizer_connect_by_cost_based=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_elimination=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=240
*._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_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_transitivity_retain=TRUE
*._optimizer_undo_cost_change='11.1.0.6'
*._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
*._right_outer_hash_enable=TRUE
*._selfjoin_mv_duplicates=TRUE
*._sql_model_unfold_forloops='RUN_TIME'
*._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
*.asm_diskgroups='DATA'
*.cluster_database=TRUE
+ASM1.core_dump_dest='/data/oracle/diag/asm/+asm/+ASM1/cdump'
+ASM2.core_dump_dest='/data/oracle/diag/asm/+asm/+ASM2/cdump'
*.diagnostic_dest='/data/oracle'
+ASM1.instance_number=1
+ASM2.instance_number=2
*.instance_type='asm'
*.large_pool_size=12M
*.optimizer_dynamic_sampling=2
*.optimizer_mode='ALL_ROWS'
*.plsql_warnings='DISABLE:ALL' # PL/SQL warnings at init.ora
*.query_rewrite_enabled='TRUE'
*.result_cache_max_size=0
*.skip_unusable_indexes=TRUE

而真正啟動ASM例項的PFILE檔案僅僅包含了幾個引數：

SQL> host more /data/oracle/product/11.1/database/dbs/init+ASM1.ora

 

##############################################################################
# Copyright (c) 1991, 2001, 2002 by Oracle Corporation
##############################################################################
 
###########################################
# Cluster Database
###########################################
cluster_database=true
 
###########################################
# Miscellaneous
###########################################
diagnostic_dest=/data/oracle
instance_type=asm
 
###########################################
# Pools
###########################################
large_pool_size=12M
 
asm_diskgroups='DATA'
 
 
 
 
+ASM2.instance_number=2
+ASM1.instance_number=1

顯然，Oracle的CREATE PFILE FROM MEMORY命令生成的初始化引數包含了一些ASM例項所不支援的引數。

Oracle在metalink的Bug No. 6742129文件中描述了這個bug，預計將在11.2版本中解決這個錯誤。