On Jun 1, 2017, at 13:44 , Karl Czajkowski <kar...@isi.edu> wrote: > If I remember correctly, isn't a compound index always just using > btree? In general, I have found better luck using several smaller > btree indices than one large compound one. Unless your entire query > can be answered from an index-only lookup, the extra columns just > bloat the btree index.
The issue is *much* more subtle than this. For repetitive queries, a compound index can be a great speedup. Best discussion I’ve seen around index design is on the website use-the-index-luke.com.
