regularly scheduled checkpoint to complete, which may take a long time (see the

configuration parameters <xref linkend="guc-checkpoint-timeout"/> and

<xref linkend="guc-checkpoint-completion-target"/>). This is

usuallypreferrable as it minimizes the impact on the running system. If you

usuallypreferable as it minimizes the impact on the running system. If you

want to start the backup as soon as possible, pass <literal>true</literal> as

the second parameter to <function>pg_backup_start</function> and it will

request an immediate checkpoint, which will finish as fast as possible using

an extension to implement.

</para>

<para>

To create a new custom WALresouce manager, first define an

To create a new custom WALresource manager, first define an

<structname>RmgrData</structname> structure with implementations for the

resource manager methods. Refer to

<filename>src/backend/access/transam/README</filename> and