From 10e9cd22991b352685fe49cfa92dbcd72048c711 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Sat, 30 Jun 2001 22:03:26 +0000
Subject: Allow default transaction isolation level (a.k.a. set session
 characteristics) to be set through GUC.

---
 doc/src/sgml/ref/set_transaction.sgml | 14 +++++++++++++-
 doc/src/sgml/runtime.sgml             | 31 +++++++++++++++++++++++++++----
 2 files changed, 40 insertions(+), 5 deletions(-)

(limited to 'doc/src')

diff --git a/doc/src/sgml/ref/set_transaction.sgml b/doc/src/sgml/ref/set_transaction.sgml
index 488ee6ac31c..aa97b2f7d43 100644
--- a/doc/src/sgml/ref/set_transaction.sgml
+++ b/doc/src/sgml/ref/set_transaction.sgml
@@ -1,4 +1,4 @@
-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.3 2000/11/24 20:16:38 petere Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/ref/set_transaction.sgml,v 1.4 2001/06/30 22:03:25 petere Exp $ -->
 <refentry id="SQL-SET-TRANSACTION">
  <docinfo>
   <date>2000-11-24</date>
@@ -74,6 +74,18 @@ SET SESSION CHARACTERISTICS AS TRANSACTION ISOLATION LEVEL { READ COMMITTED | SE
   </para>
  </refsect1>
 
+ <refsect1>
+  <title>Notes</title>
+
+  <para>
+   The session default transaction isolation level can also be set
+   with the command <literal>SET default_transaction_isolation =
+   '<replaceable>value</replaceable>'</literal> and in the
+   configuration file.  Consult the <citetitle>Administrator's
+   Guide</citetitle> for more information.
+  </para>
+ </refsect1>
+
  <refsect1 id="R1-SQL-SET-TRANSACTION-3">
   <title>Compatibility</title>
 
diff --git a/doc/src/sgml/runtime.sgml b/doc/src/sgml/runtime.sgml
index 730d031a0f9..f73bddf354b 100644
--- a/doc/src/sgml/runtime.sgml
+++ b/doc/src/sgml/runtime.sgml
@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.71 2001/06/30 21:15:57 darcy Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/runtime.sgml,v 1.72 2001/06/30 22:03:25 petere Exp $
 -->
 
 <Chapter Id="runtime">
@@ -996,6 +996,29 @@ env PGOPTIONS='-c geqo=off' psql
       </listitem>
      </varlistentry>
 
+     <varlistentry>
+      <indexterm>
+       <primary>transaction isolation level</primary>
+      </indexterm>
+
+      <term>DEFAUL_TRANSACTION_ISOLATION (<type>string</type>)</term>
+      <listitem>
+       <para>
+        Each SQL transaction has an isolation level, which can be
+        either <quote>read committed</quote> or
+        <quote>serializable</quote>.  This parameter controls what the
+        isolation level of each new transaction is set to.  The
+        default is read committed.
+       </para>
+
+       <para>
+        Consult the <citetitle>PostgreSQL User's Guide</citetitle> and
+        the command <command>SET TRANSACTION</command> for more
+        information.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry>
       <term>DYNAMIC_LIBRARY_PATH (<type>string</type>)</term>
       <listitem>
@@ -1051,9 +1074,9 @@ dynamic_library_path = '/usr/local/lib:/home/my_project/lib:$libdir:$libdir/cont
         will use the <function>fsync()</> system call in several
         places to make sure that updates are physically written to
         disk and do not hang around in the kernel buffer cache. This
-        increases the chance that a database installation will still
-        be usable after an operating system or hardware crash by a
-        large amount. (Crashes of the database server itself do
+        increases the chance by a large amount that a database
+        installation will still be usable after an operating system or
+        hardware crash.  (Crashes of the database server itself do
         <emphasis>not</> affect this consideration.)
        </para>
 
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