nbtree README: move VACUUM linear scan section.

Peter Geoghegan <pg@bowt.ie>

Commit: 128dd901a5c87e11c6a8cbe227a806cdc3afd10d
Author: Peter Geoghegan <pg@bowt.ie>
Date: 2021-02-18T05:13:15Z
Releases: 14.0
nbtree README: move VACUUM linear scan section.

Discuss VACUUM's linear scan after discussion of tuple deletion by
VACUUM, but before discussion of page deletion by VACUUM.  This
progression is a lot more natural.

Also tweak the wording a little.  It seems unnecessary to talk about how
it worked prior to PostgreSQL 8.2.

Files

PathChange+/−
src/backend/access/nbtree/README modified +28 −27