Database Tuning (MOSC)

MOSC Banner

Can I revert back to original plan if new plan fails?

edited Jan 28, 2020 4:00AM in Database Tuning (MOSC) 5 commentsAnswered

I receive complain from some users that their query is running quite slow, I did some checking via EM and found that the plan is using very high CPU based on ADDM advisor.

Tuning advisor advice to apply a different explain plan to it & when I did the comparison view, i can see the cost drops drastically. Before I go ahead and apply this new plan can will tuning advisor save the previous plan so I can revert back if the new plan doesn't works? Below is the comparison between the old & new plan.

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