Re: index question
| От | David G. Johnston |
|---|---|
| Тема | Re: index question |
| Дата | |
| Msg-id | CAKFQuwZ1HWPbBFVZRhSA+ZCtQ6-nU_+h59babnpBy71uEPeN-A@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: index question ("drum.lucas@gmail.com" <drum.lucas@gmail.com>) |
| Ответы |
Re: index question
|
| Список | pgsql-general |
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.
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