Minor sync rep documentation improvements.

- Make the name of the ID tag for the GUC entry match the GUC name.
- Clarify that synchronous_replication waits for xlog flush, not receipt.
- Mention that synchronous_replication won't wait if max_wal_senders=0.

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index a4c1e84ad8af511a35b2ee1cc96d71a1145e126a..b774fa617c2e559357d791a5f25d2184cb230adb 100644 (file)
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -2045,9 +2045,11 @@ SET ENABLE_SEQSCAN TO OFF;
         for confirmation of successful replication. That delay will
         increase depending upon the physical distance and network activity
         between primary and standby. The commit wait will last until a
-        reply from the current synchronous standby indicates it has received
-        the commit record of the transaction. Synchronous standbys must
-        already have been defined (see ).
+        reply from the current synchronous standby indicates it has written
+        the commit record of the transaction to durable storage.  This
+        parameter has no effect if
+         is empty or
+         is zero.
        
        
         This parameter can be changed at any time; the
@@ -2062,7 +2064,7 @@ SET ENABLE_SEQSCAN TO OFF;
       
      
 
-     
+     hronous-standby-names" xreflabel="synchronous_standby_names">
       synchronous_standby_names (string)
       
        synchronous_standby_names configuration parameter