Re: Large pkey index on insert-only table

2023-06-26 Thread Peter Geoghegan
On Mon, Jun 26, 2023 at 8:50 AM Devin Ivy wrote: > Any thoughts on why this may be, or where to go next to continue tracking > this down? Also, could the primary key column order `(id, ancestor_id)` vs > `(ancestor_id, id)` significantly affect the index size depending on the > column cardinal

Large pkey index on insert-only table

2023-06-26 Thread Devin Ivy
Hi all, I have a suspiciously large index, and I could use a hand finding a root cause for its size. This index supports the primary key for a closure table that models threaded comments with columns `(id, ancestor_id, depth)`. The primary key is composite: `(id, ancestor_id)`. The id columns ar