for confirmation of successful replication. That delay will

increase depending upon the physical distance and network activity

between primary and standby. The commit wait will last until a

reply from the current synchronous standby indicates it has received

the commit record of the transaction. Synchronous standbys must

already have been defined (see <xref linkend="guc-sync-standby-names">).

reply from the current synchronous standby indicates it has written

the commit record of the transaction to durable storage. This

parameter has no effect if

<xref linkend="guc-synchronous-standby-names"> is empty or

<xref linkend="guc-max-wal-senders"> is zero.

</para>

<para>

This parameter can be changed at any time; the

</listitem>

</varlistentry>

<varlistentry id="guc-sync-standby-names" xreflabel="synchronous_standby_names">

<varlistentry id="guc-synchronous-standby-names" xreflabel="synchronous_standby_names">

<term><varname>synchronous_standby_names</varname> (<type>string</type>)</term>

<indexterm>

<primary><varname>synchronous_standby_names</> configuration parameter</primary>