--- json.sgml.orig	2018-04-03 17:02:23.000000000 +0300
+++ json.sgml	2018-04-25 22:39:54.000000000 +0300
@@ -46,6 +46,11 @@
   only the last value is kept.
  </para>
 
+<para>
+  The longest possible <type>json</type> value is 1 Gb. For <type>jsonb</type>
+  the limit is 256 Mb.
+</para>
+
  <para>
   In general, most applications should prefer to store JSON data as
   <type>jsonb</type>, unless there are quite specialized needs, such as