On Tue, Jun 23, 2026 at 4:06 PM Peter Geoghegan <[email protected]> wrote: > Importantly, this allows VISITED_PAGES_LIMIT to work exactly the same > way on standbys as it does today. During hot standby, LP_DEAD bits > cannot be set or used to avoid heap fetches. As long as each leaf page > returns at least one match (which could still be a TID pointing to a > dead heap tuple), nothing changes -- INDEX_PAGES_LIMIT does nothing > new, we rely on VISITED_PAGES_LIMIT in the traditional way.
I attach this patch here, to be tracked as its own CF entry going forward. I committed "Add slot-based table AM index scan interface" this morning, which this INDEX_PAGES_LIMIT patch depends on. There's no longer any reason to tie this patch to the index prefetching/amgetbatch work. -- Peter Geoghegan
v1-0001-Limit-get_actual_variable_range-leaf-page-reads.patch
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