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-rw-r--r--doc/src/sgml/high-availability.sgml9
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/src/sgml/high-availability.sgml b/doc/src/sgml/high-availability.sgml
index 94d5ae8d35..a89296905b 100644
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -1916,6 +1916,15 @@ LOG: database system is ready to accept read only connections
your setting of <varname>max_prepared_transactions</> is 0.
</para>
</listitem>
+ <listitem>
+ <para>
+ The Serializable transaction isolation level is not yet available in hot
+ standby. (See <xref linkend="xact-serializable"> and
+ <xref linkend="serializable-consistency"> for details.)
+ An attempt to set a transaction to the serializable isolation level in
+ hot standby mode will generate an error.
+ </para>
+ </listitem>
</itemizedlist>
</para>