SQL Performance (MOSC)

MOSC Banner

ERStudio performance with Oracle 12c

edited Aug 25, 2016 5:00AM in SQL Performance (MOSC) 2 commentsAnswered

Is there anyone using Embarcadero's ERStudio Data Architect with Oracle 12c and noticed that the performance of reverse-engineering a database (e.g. in the Compare & Merge utility - 'compare with live database') is a lot worse in 12c compared to 11g?

I've done a lot of benchmarking and I've found that gathering dictionary stats and switching off optimizer_adaptive_features helps a lot but its still nowhere near as fast as 11g. I think the problem is partly ERStudio which uses literals in the SQL it submits so every query gets re-parsed (once for each table in your data model) but a large part of the performance problem seems to the 12c data dictionary because I get similar results just using raw SQL queries (of varying size/complexity).

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