<< 返回文章列表 在 Oracle Database 18.3 版本发布之后,一系列新的参数被加入到数据库中,这些新的参数就代表了数据库中新增的特性。
Oracle 版本Oracle 18.3 版本参数比较12.2 看新特性优化诊断增强
2018年8月3日
eygle
2237
在 Oracle Database 18.3 版本发布之后,一系列新的参数被加入到数据库中,这些新的参数就代表了数据库中新增的特性。
很多特性 Oracle 并未明确解释何说明,但是我们可以通过参数揣摩端倪。
以下列表是对比 Oracle Database 12.2 版本,18.3 中新增的参数。通过 x$ksppi 可以看到 12.2 版本有 4846 个参数,而 18.3 有 5159 个参数.
从参数数量上来说,增加了 313 个,这是一个不小的数字,无论是跟踪诊断,性能优化,还是 异常恢复,这些参数都是核心所在。
KSPPINM KSPPSTVL KSPPDESC -------------------------------------------------- ------------------------- -------------------------------------------------------------------------------- _EnableDDLTtriggerTracing FALSE enable ddl trigger tracing _EnableShadowTypes FALSE enable shadow types _REMOVE_INACTIVE_STANDBY_TDE_MASTER_KEY FALSE Remove Inactive Standby TDE Master Key _REMOVE_STDBY_OLD_KEY_AFTER_CHECKPOINT_SCN TRUE Remove standby old key after checkpoint SCN _STFTranslateDynamicSQL FALSE if TRUE translation profile will translate dynamic SQL statements __memoptimize_xmem_pool_size_metadata 0 Size of extended cache metadata of MEMOPTIMIZE buffer pool for standard block si ze buffers __sga_current_size 0 Current size for PDB SGA _adg_auto_close_pdb TRUE ADG recovery auto close PDB upon PDB drop/unplug/rename marker _adg_objectlock_attempts 2 Maximum attemps for objectlock get on ADG _adg_objectlock_maxnum 1000 The maximum limit of the objectlock number on ADG _adg_objectlock_timeout 0 timeout for objectlock get on ADG in centiseconds _adg_redirect_flags 0 Flags for controlling ADG's Statement Redirection behavior _allocate_flashback_buffer FALSE Allocate flashback buffer at mount time even if flashback is off _allow_cross_endian_dictionary FALSE Allow cross-endian data dictionary _app_container_debug 0 Enable Debug tracing in Application container _apppdb_multi_slave_sync TRUE Multiple slaves used during Application sync _aq_dqblocks_in_cache 0 deq blocks in cache _aq_free_list_pools 10 state object and transaction memory pools _aq_lb_garbage_col_interval 600 AQ LB garbage collect interval _aq_lb_subht_bkt_ltch 32 AQ LB subscriber ht bucket latches _aq_lb_subht_elm_ltch 128 AQ LB subscriber ht element latches _aq_max_pdb_close_msg 1 Max Number of AQ Recovery Messages when pdb is closed _aq_scrambled_deqlog 1 scrambled deqlog _asm_allow_dgname_special_chars FALSE Enable the use of special characters in diskgroup names _asm_async_scrub_reap_wait 100000 Async scrubbing reaping IO wait in microseconds _asm_cancel_delta 75000 Delta timeout for blocking big writes in milliseconds _asm_enable_batch_scrub FALSE Allow scrubbing verification to run in batch mode _asm_enable_kfios FALSE Enable KFIOS module _asm_oda_type ODA Type _asm_proxy_online_restart 0 Allow patching while ADVM volumes are online _asm_pstonpartners TRUE Select ideal PST disks following partnership _asm_reloc_cic FALSE Allow relocation during rolling migration _asm_relocation_scheme alloc_p2 alloc_s3 reb_p2 ASM allocation / relocation scheme reb_s1 bal_p2 bal_s3 prep _p2 prep_s3 _asm_write_badfdata_in_contentcheck TRUE Write BADFDA7A in content check _asm_zero_power_limit allow setting zero power limit _async_scn_sync OFF Asynchronous SCN Sync Setting _auto_dismount_on_pdb_close FALSE Enable implicit PDB dismount on PDB close _auto_rcv_pdb_open 1 enable automatic recovery during pdb open _awr_incremental_flush_enabled TRUE Enable/Disable AWR automatic incremental flushing _backup_block0 default backup block0 _bequeath_via_broker FALSE Bequeath connections via broker _bloom_extent_size 0 bloom filter extent size in bytes _bloom_filter_setops_enabled TRUE Allow bloom filter to be pushed through set operations _bloom_max_wait_time 50 bloom filter wait time upper bound (in ms) _bloom_pruning_setops_enabled TRUE Allow bloom pruning to be pushed through set operations _bloom_use_shared_pool FALSE use shared pool for bloom filter _bloom_wait_on_rac FALSE enables bloom filter (with hash hash distribution) wait on RAC _capability_simulate Simulate the capabilities for testing _cdb_fleet_sync_timeout 10 Time in minutes to wait for sync of stub entry in CDB Fleet _cdb_port 0 Port number for CDB _cdb_view_no_skip_restricted FALSE do not skip RESTRICTED mode PDBs from results of CONTAINERS() _cell_offload_hybrid_processing TRUE enable hybrid SQL processing offload to cells _cell_offload_vector_groupby_force FALSE force offload of vector group by _cgs_publish_netinfo_collect_event_chm TRUE enable cgs publish collect_netinfo event to event stream for CHM _cgs_publish_netinfo_collect_event_haip FALSE enable cgs publish collect_netinfo event to event stream for HAIP _clear_preserved_buffers TRUE Clear preserved buffers before DB reopen after switchover _client_result_cache_ramthreshold client_result_cache_ramthreshold _cloud_service_sim 0 simulate cloud services in Database _cloud_service_type cloud service type _con_map_sql_enforcement TRUE disable container map SQL enforcement _connection_broker_handout_accept FALSE connection broker accepts prior to handout _cross_con_collection FALSE enable cross container collection _datapump_gather_stats_on_load FALSE Gather table statistics during Data Pump load rather thanimporting statistics fr om the dump file. This should be set to TRUE in the lockdown profile in a DWCS e nvironment. 注意:由于字数原因,请继续浏览下篇文章。