I have a few instances of the same PowerCenter session running in parallel. They attempt to insert a large number of rows into the same target table. The table has a unique constraint on the natural key columns that causes a lot of rows to be rejected due to unique constraint violation. These rows are saved in a reject file and it hurts the performance of the entire process.
I don't need a list of rejected rows - it was my conscious decision to prevent the duplicate rows on the database level, not in the mapping. This is a known side effect of this design decision.
Is there a setting to prevent the rejected rows from being logged in a reject file?