Current File : //opt/alt/postgresql11/usr/share/doc/alt-postgresql11-9.2.24/html/recovery-target-settings.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>Recovery Target Settings</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REV="MADE"
HREF="mailto:pgsql-docs@postgresql.org"><LINK
REL="HOME"
TITLE="PostgreSQL 9.2.24 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="Recovery Configuration"
HREF="recovery-config.html"><LINK
REL="PREVIOUS"
TITLE="Archive Recovery Settings"
HREF="archive-recovery-settings.html"><LINK
REL="NEXT"
TITLE="Standby Server Settings"
HREF="standby-settings.html"><LINK
REL="STYLESHEET"
TYPE="text/css"
HREF="stylesheet.css"><META
HTTP-EQUIV="Content-Type"
CONTENT="text/html; charset=ISO-8859-1"><META
NAME="creation"
CONTENT="2017-11-06T22:43:11"></HEAD
><BODY
CLASS="SECT1"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
><A
HREF="index.html"
>PostgreSQL 9.2.24 Documentation</A
></TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
TITLE="Archive Recovery Settings"
HREF="archive-recovery-settings.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="recovery-config.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
>Chapter 26. Recovery Configuration</TD
><TD
WIDTH="20%"
ALIGN="right"
VALIGN="top"
><A
TITLE="Standby Server Settings"
HREF="standby-settings.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="RECOVERY-TARGET-SETTINGS"
>26.2. Recovery Target Settings</A
></H1
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><A
NAME="RECOVERY-TARGET-NAME"
></A
><TT
CLASS="VARNAME"
>recovery_target_name</TT
>
(<TT
CLASS="TYPE"
>string</TT
>)</DT
><DD
><P
> This parameter specifies the named restore point, created with
<CODE
CLASS="FUNCTION"
>pg_create_restore_point()</CODE
> to which recovery will proceed.
At most one of <TT
CLASS="VARNAME"
>recovery_target_name</TT
>,
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-TIME"
>recovery_target_time</A
> or
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-XID"
>recovery_target_xid</A
> can be specified. The default is to
recover to the end of the WAL log.
</P
></DD
><DT
><A
NAME="RECOVERY-TARGET-TIME"
></A
><TT
CLASS="VARNAME"
>recovery_target_time</TT
>
(<TT
CLASS="TYPE"
>timestamp</TT
>)</DT
><DD
><P
> This parameter specifies the time stamp up to which recovery
will proceed.
At most one of <TT
CLASS="VARNAME"
>recovery_target_time</TT
>,
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-NAME"
>recovery_target_name</A
> or
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-XID"
>recovery_target_xid</A
> can be specified.
The default is to recover to the end of the WAL log.
The precise stopping point is also influenced by
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-INCLUSIVE"
>recovery_target_inclusive</A
>.
</P
></DD
><DT
><A
NAME="RECOVERY-TARGET-XID"
></A
><TT
CLASS="VARNAME"
>recovery_target_xid</TT
> (<TT
CLASS="TYPE"
>string</TT
>)</DT
><DD
><P
> This parameter specifies the transaction ID up to which recovery
will proceed. Keep in mind
that while transaction IDs are assigned sequentially at transaction
start, transactions can complete in a different numeric order.
The transactions that will be recovered are those that committed
before (and optionally including) the specified one.
At most one of <TT
CLASS="VARNAME"
>recovery_target_xid</TT
>,
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-NAME"
>recovery_target_name</A
> or
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-TIME"
>recovery_target_time</A
> can be specified.
The default is to recover to the end of the WAL log.
The precise stopping point is also influenced by
<A
HREF="recovery-target-settings.html#RECOVERY-TARGET-INCLUSIVE"
>recovery_target_inclusive</A
>.
</P
></DD
><DT
><A
NAME="RECOVERY-TARGET-INCLUSIVE"
></A
><TT
CLASS="VARNAME"
>recovery_target_inclusive</TT
>
(<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
> Specifies whether we stop just after the specified recovery target
(<TT
CLASS="LITERAL"
>true</TT
>), or just before the recovery target
(<TT
CLASS="LITERAL"
>false</TT
>).
Applies to both <A
HREF="recovery-target-settings.html#RECOVERY-TARGET-TIME"
>recovery_target_time</A
>
and <A
HREF="recovery-target-settings.html#RECOVERY-TARGET-XID"
>recovery_target_xid</A
>, whichever one is
specified for this recovery. This indicates whether transactions
having exactly the target commit time or ID, respectively, will
be included in the recovery. Default is <TT
CLASS="LITERAL"
>true</TT
>.
</P
></DD
><DT
><A
NAME="RECOVERY-TARGET-TIMELINE"
></A
><TT
CLASS="VARNAME"
>recovery_target_timeline</TT
>
(<TT
CLASS="TYPE"
>string</TT
>)</DT
><DD
><P
> Specifies recovering into a particular timeline. The default is
to recover along the same timeline that was current when the
base backup was taken. Setting this to <TT
CLASS="LITERAL"
>latest</TT
> recovers
to the latest timeline found in the archive, which is useful in
a standby server. Other than that you only need to set this parameter
in complex re-recovery situations, where you need to return to
a state that itself was reached after a point-in-time recovery.
See <A
HREF="continuous-archiving.html#BACKUP-TIMELINES"
>Section 24.3.5</A
> for discussion.
</P
></DD
><DT
><A
NAME="PAUSE-AT-RECOVERY-TARGET"
></A
><TT
CLASS="VARNAME"
>pause_at_recovery_target</TT
>
(<TT
CLASS="TYPE"
>boolean</TT
>)</DT
><DD
><P
> Specifies whether recovery should pause when the recovery target
is reached. The default is true.
This is intended to allow queries to be executed against the
database to check if this recovery target is the most desirable
point for recovery. The paused state can be resumed by using
<CODE
CLASS="FUNCTION"
>pg_xlog_replay_resume()</CODE
> (See
<A
HREF="functions-admin.html#FUNCTIONS-RECOVERY-CONTROL-TABLE"
>Table 9-62</A
>), which then
causes recovery to end. If this recovery target is not the
desired stopping point, then shutdown the server, change the
recovery target settings to a later target and restart to
continue recovery.
</P
><P
> This setting has no effect if <A
HREF="runtime-config-replication.html#GUC-HOT-STANDBY"
>hot_standby</A
> is not
enabled, or if no recovery target is set.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="archive-recovery-settings.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Home</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="standby-settings.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>Archive Recovery Settings</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="recovery-config.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>Standby Server Settings</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>
Mini Shell