Database Administration (MOSC)

MOSC Banner

Query behavior after upgrade from 12.1 to 18c

in Database Administration (MOSC) 44 comments

Oracle 12.1.0.2 SE2 and Oracle 18c SE2, both on the same OL6 server

Oracle Restart/Standalone ASM 18c.

 Am in the midst of regression testing an upgrade from 12.1.0.2 to 18c. Both databases on same server. Both duplicated from 12.1.0.2 production (rman DUPLICATE DATABASE FROM BACKUP). One still at 12.1.0.2, same as prod. Call it STG. The other has been upgraded to 18c. Call it DEV. This is primarily a DW application.

 Testing turned up a query that completes in a few seconds in the 12.1.0.2 STG database, but in the 18c DEV, it always runs so long we end up killing it. Let it run for 40 minutes one time. The query is actually in a cursor driving a data load.

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