Docs: create some user-facing documentation about index-only scans.

Tom Lane <tgl@sss.pgh.pa.us>

Commit: e6dd664d0dd362235fd0af31360ecbf29434c4c1
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2016-05-08T20:36:19Z
Releases: 9.6.0
Docs: create some user-facing documentation about index-only scans.

We didn't have any real user documentation about how index-only scans
work or how to design indexes to exploit them.  Remedy that.
Per gripe from David Johnston.

Files

PathChange+/−
doc/src/sgml/config.sgml modified +2 −4
doc/src/sgml/indexam.sgml modified +10 −8
doc/src/sgml/indices.sgml modified +193 −8
doc/src/sgml/maintenance.sgml modified +8 −5
doc/src/sgml/storage.sgml modified +4 −2

Documentation touched