Note that change of this parameter doesn't affect any existing

connections until they are re-established.

</para>

<para>

<varname>postgres_fdw.application_name</varname> can be any string

of any length and contain even non-ASCII characters. However when

it's passed to and used as <varname>application_name</varname>

in a foreign server, note that it will be truncated to less than

<symbol>NAMEDATALEN</symbol> characters and any characters other

than printable ASCII ones in it will be replaced with question

marks (<literal>?</literal>).

See <xref linkend="guc-application-name"/> for details.

</para>

</listitem>

</varlistentry>

</variablelist>