doc: improve description of synchronous_commit modes
authorBruce Momjian <bruce@momjian.us>
Thu, 15 Oct 2020 19:15:29 +0000 (15:15 -0400)
committerBruce Momjian <bruce@momjian.us>
Thu, 15 Oct 2020 19:15:29 +0000 (15:15 -0400)
commita97e85f2be400a08d863c1d65f172eb48af3e9b5
tree7778baca6ccd2d0c1acc3d96dcb287da6365544e
parent93f84d59f80d11a3d8ade9ae71560162d6f3ecb2
doc:  improve description of synchronous_commit modes

Previously it wasn't clear exactly what each of the synchronous_commit
modes accomplished.  This clarifies that, and adds a table describing it.
Only backpatched through 9.6 since 9.5 doesn't have all the options.

Reported-by: kghost0@gmail.com
Discussion: https://postgr.es/m/159741195522.14321.13812604195366728976@wrigleys.postgresql.org

Backpatch-through: 9.6
doc/src/sgml/config.sgml
src/include/access/xact.h