Problem with MERGE INTO setting

Oracle Hello community,

Server: 11.1.0.7

My MERGE statement is very slow. I cut again and made a single update and a single insert statement, and it is much faster, the cause of a suspicion / * + rule * / use. When I try to use the same trick for the MERGE statement, it won't work, it still takes much too long. Before I post my Merge statement, is the problem with advice and FUSION?

Ikrischer

Thanks for all the entries that you have provided.

What intrigues me is the fact that your cardinalities are always 1.
(Unfortunately I have no available DB 11.1)

When I run the routine, all the tables are empty and all tables are analysed.

Can you describe your routine more in detail?
What measures are being processed?
Is it a kind of ETL process? At what point in your process are you collecting statistics and how?
Are you really using the command "scan table", or are you using "dbms_stats.gather_table_stats?

Tags: Database

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