On 12/19/24 20:09, Jon Zeppieri wrote:
The table is freshly vacuumed. If I disable bitmap scans, it will do an index only scan, which performs better. For the bitmap heap scan, it says "Heap Blocks: exact=27393," whereas for the index only scan, it's "Heap Fetches: 27701."
So you have 100% heap fetches. Are you sure that your table is freshly vacuumed? Please note that VACUUM FULL doesn't create the visibility map, so you still have to run a plain VACUUM for this.
