On Mon, May 2, 2016 at 12:56 PM, drum.lu...@gmail.com <drum.lu...@gmail.com> wrote:
> >>> >> Index size and index usage are unrelated. Modifications to the index to >> keep it in sync with the table do not count as "usage" - only reading it >> for where clause use counts. >> >> >> So only those with* 0 size*, should be deleted? Is that you're saying? > I'm not offering advice as to when to delete or not delete any particular index. > Can you be more clear please? > > Probably not :) You cannot make an inference about an index's usage by looking at its size. Similarly, a seldom used but large index is not necessarily one you want to remove if doing so causes a once-a-month process that usually take seconds or minutes to now take hours. David J.
