process status of the WAL receiver process, displayed using the

<command>ps</> command (see <xref linkend="monitoring-ps"> for details).

</para>

<para>

You can retrieve a list of WAL sender processes via the

<link linkend="monitoring-stats-views-table">

<literal>pg_stat_replication</></link> view. Large differences between

<function>pg_current_xlog_location</> and <literal>sent_location</> field

might indicate that the master server is under heavy load, while

differences between <literal>sent_location</> and

<function>pg_last_xlog_receive_location</> on the standby might indicate

network delay, or that the the standby is under heavy load.

</para>

</sect3>

</sect2>

</entry>

</row>

<row>

<entry><structname>pg_stat_replication</><indexterm><primary>pg_stat_replication</primary></indexterm></entry>

<entry>One row per WAL sender process, showing process <acronym>ID</>,

user OID, user name, application name, client's address and port number,

time at which the server process began execution, and transaction log

location.

</entry>

</row>

<row>

<entry><structname>pg_stat_all_tables</><indexterm><primary>pg_stat_all_tables</primary></indexterm></entry>

<entry>For each table in the current database (including TOAST tables),