On Wed, 2026-01-28 at 10:31 -0500, Ron Johnson wrote: > In the example in this (quite helpful) Cybertec post, 10475 HugePages are allocated. > https://www.cybertec-postgresql.com/en/huge-pages-postgresql/ > > If we set "huge_pages = off" within PG and then restart PG, will Linux see those 10475 HugePages as off-limits to normal 4KiB allocations?
Yes. That's why it is a good idea to set "huge_pages = on" if you intend to use them with PostgreSQL. Otherwise it may happen that PostgreSQL resorts to allocating shared buffers using normal memory, and your huge pages just sit around and are wasted.
