Document values of stats_fetch_consistency in postgresql.conf.sample

Issue noted while looking at a patch related to that.

Discussion: https://postgr.es/m/ZE9LiFc7JdNHokz/@paquier.xyz

diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index b70c66ca8763c0375e6d5e2ab9bd11ca16c7799c..11a4cf6cfbb011c6d975bb56072257fffbea9463 100644 (file)
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -621,7 +621,7 @@
 #track_io_timing = off
 #track_wal_io_timing = off
 #track_functions = none                        # none, pl, all
-#stats_fetch_consistency = cache
+#stats_fetch_consistency = cache       # cache, none, snapshot
 
 
 # - Monitoring -