On 2019-Apr-24, Alvaro Herrera wrote:
> Note that with pg12 you could have your own table AM that supported
> wider ItemIds as a (small?) change on heapam, rather than supplant it
> for all tables. That way you would only pay the (probably considerable)
> cost of the wider line pointers on all tables ...
"That way you would only pay the (probably considerable) cost of the
wider line pointers on the tables that need it rather than all of them."
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Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services