Document that wal_sync_method open_* methods use O_DIRECT, if available.

Backpatch to 8.2.X.

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 5b03122e5607c344ae42da583403241ab2090499..2d4dfa8bd3a9e814f0038f449ae929ded88da70e 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -1,4 +1,4 @@
-
+
 
 
   Server Configuration
@@ -1385,6 +1385,7 @@ SET ENABLE_SEQSCAN TO OFF;
         Not all of these choices are available on all platforms.
         The default is the first method in the above list that is supported
         by the platform.
+        The open_* options also use O_DIRECT if available.
         This parameter can only be set in the postgresql.conf
         file or on the server command line.