doc: rewrite random_page_cost description
authorBruce Momjian <[email protected]>
Thu, 30 Oct 2025 23:11:52 +0000 (19:11 -0400)
committerBruce Momjian <[email protected]>
Thu, 30 Oct 2025 23:11:52 +0000 (19:11 -0400)
commit3f76f656f9dcda4135f5975d06cd0be14047ebcf
treef5421a1c3f2932e0e3be0ca77bb0ff91cff3fe41
parenta027ce32593bd31fd19b82bd21494cbdf9494588
doc:  rewrite random_page_cost description

This removes some of the specifics of how the default was set, and adds
a mention of latency as a reason the value is lower than the storage
hardware might suggest.  It still mentions caching.

Discussion: https://postgr.es/m/CAKAnmmK_nSPYr53LobUwQD59a-8U9GEC3XGJ43oaTYJq5nAOkw@mail.gmail.com

Backpatch-through: 13
doc/src/sgml/config.sgml