Database Tuning (MOSC)

MOSC Banner

11gR2 : Hidden parameters after upgrade + virtualization

edited Jan 24, 2014 6:00AM in Database Tuning (MOSC) 3 commentsAnswered
Hi ,

After migration from 11gR2 to 11.2.03 and server  virtualization we noticed the appearance of hidden parameters in AWR report like :

_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 11.2.0.3.0
_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

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center