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diff --git a/doc/src/sgml/ref/pgbench.sgml b/doc/src/sgml/ref/pgbench.sgml
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@@ -824,6 +824,30 @@ pgbench <optional> <replaceable>options</replaceable> </optional> <replaceable>d
</refsect1>
<refsect1>
+ <title>Environment</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><envar>PGHOST</envar></term>
+ <term><envar>PGPORT</envar></term>
+ <term><envar>PGUSER</envar></term>
+
+ <listitem>
+ <para>
+ Default connection parameters.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ This utility, like most other <productname>PostgreSQL</productname> utilities,
+ uses the environment variables supported by <application>libpq</application>
+ (see <xref linkend="libpq-envars"/>).
+ </para>
+ </refsect1>
+
+ <refsect1>
<title>Notes</title>
<refsect2>