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.



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