Database Tuning (MOSC)

MOSC Banner

Dynamic Sampling

in Database Tuning (MOSC) 5 commentsAnswered ✓

Dear Experts,

We have a general question. Our database version 19.17

We have a query where the cardinality is not properly calculated. Our stats are up to date.

We used dynamic sampling 11 and optimizer came up with correct count.

we cannot add the hint,because some times,the query will be submitted by 10 to 20 users,which may increase the parse time. Is there any alternative,that you can suggest.

Currently our stats job runs with 30% estimate.

Is dynamic sampling 11 equal to 100% estimate with Gather Stats.

If we run the stats with 100% for the problematic query, will it work without dynamic sampling 11?

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