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Query performs slowly first time, then faster next time - how to find out why?

User_5VCW3May 11 2021

One of our applications fires queries that execute slowly first time, but when I execute the same query again , it is faster . By not being able to find out WHY the query is slow, I also can't find a solution. We've been struggling with this issue for quite some time we are still running on Oracle 11Gr2 standard edition:
execution plan first run:
statistics_avant.txt (115.96 KB)execution plan second run:
statistics_apres.txt (116.53 KB)Please advise.

Thanks

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Added on May 11 2021
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