doc: list unlogged tables as a non-durable option

diff --git a/doc/src/sgml/perform.sgml b/doc/src/sgml/perform.sgml
index 482490ba78c3ee91471d2c839c2a8774df61b8a2..f0ab440cd385d8573214512e56811476783b5df0 100644 (file)
--- a/doc/src/sgml/perform.sgml
+++ b/doc/src/sgml/perform.sgml
@@ -1572,6 +1572,15 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
       
      
 
+     
+      
+       Turn off ;  there might be no
+       need to force WAL writes to disk on every
+       commit.  This setting does risk transaction loss (though not data
+       corruption) in case of a crash of the database.
+      
+     
+
      
       
        Turn off ;  there is no need
@@ -1590,12 +1599,12 @@ SELECT * FROM x, y, a, b, c WHERE something AND somethingelse;
 
      
       
-       Turn off ;  there might be no
-       need to write the WAL to disk on every
-       commit.  This setting does risk transaction loss (though not data
-       corruption) in case of a crash of the database alone.
+       Create unlogged
+       tables to avoid WAL writes, though it
+       makes the tables non-crash-safe.
       
      
+