On 11/17/14 12:34 PM, Fujii Masao wrote:
> Add --synchronous option to pg_receivexlog, for more reliable WAL writing.
The last two sentences of this piece of documentation are a bit
hand-wavy and hard to parse. Could you clarify this?
<varlistentry> <term><option>-S <replaceable>slotname</replaceable></option></term>
<term><option>--slot=<replaceableclass="parameter">slotname</replaceable></option></term> <listitem> <para>
Require <application>pg_receivexlog</application> to use an existing replication slot (see <xref
linkend="streaming-replication-slots">). When this option is used, <application>pg_receivexlog</> will report
a flush position to the server, indicating when each segment has been synchronized to disk so that the server
canremove that segment if it is not otherwise needed. <literal>--synchronous</literal> option must be
specifiedwhen making <application>pg_receivexlog</> run as synchronous standby by using replication slot.
OtherwiseWAL data cannot be flushed frequently enough for this to work correctly. </para> </listitem>
</varlistentry>