Dear All,
We have a query that suddenly starts today to take too much time when running on AS/400. It was taking a less than 1 minute but today it took around 3 hours!!
The files in the query have not been changed or increased too much in size.
When we run the same SQL on a Oracle database, it took a few seconds (Part of database tables on the AS/400 is being sent daily to an equivalent ones on oracle database).
Could you please advise me how to investigate what is the problem on the AS/400 side...and how to enhance the performance.
Many thanks for your help,
Best regards
Dina
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