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Am 30.03.2023 um 16:32 schrieb Ken Meade <kmeade@xxxxxxxxxxxxxxxxx>:
This raised a question for me. How could you investigation your indices to determine last use, number of records affected, etc across all your files.
Perhaps indices are no longer required and could be deleted and would that improve performance?
Not sure if "last use" is recorded. Problem is: The more statistics you gather, the more that gathering will affect system performance negatively.
Regarding your question, it boils down on "know your system", aka the software which is using those tables, and how. At least WHERE and JOIN clauses benefit heavily from indexes. If a field value is not used for that, I'd say the index can be deleted. This is not IBM i specific.
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