I gave a more detailed response on the post by 'menaerus, but to answer your question on config directly, you first need to enable the appropriate number of hug

I gave a more detailed response on the post by 'menaerus, but to answer your question on config directly, you first need to enable the appropriate number of hugepages with a kernel boot parameter, e.g. hugepagesz=1G hugepages=940 and then add these config lines to postgresql.conf: huge_pages = on huge_page_size = 1GB