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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:15:05 +0000 |
| commit | 46651ce6fe013220ed397add242004d764fc0153 (patch) | |
| tree | 6e5299f990f88e60174a1d3ae6e48eedd2688b2b /doc/src/sgml/oldsnapshot.sgml | |
| parent | Initial commit. (diff) | |
| download | postgresql-14-upstream.tar.xz postgresql-14-upstream.zip | |
Adding upstream version 14.5.upstream/14.5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'doc/src/sgml/oldsnapshot.sgml')
| -rw-r--r-- | doc/src/sgml/oldsnapshot.sgml | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/doc/src/sgml/oldsnapshot.sgml b/doc/src/sgml/oldsnapshot.sgml new file mode 100644 index 0000000..a665ae7 --- /dev/null +++ b/doc/src/sgml/oldsnapshot.sgml @@ -0,0 +1,33 @@ +<!-- doc/src/sgml/oldsnapshot.sgml --> + +<sect1 id="oldsnapshot" xreflabel="old_snapshot"> + <title>old_snapshot</title> + + <indexterm zone="oldsnapshot"> + <primary>old_snapshot</primary> + </indexterm> + + <para> + The <filename>old_snapshot</filename> module allows inspection + of the server state that is used to implement + <xref linkend="guc-old-snapshot-threshold" />. + </para> + + <sect2> + <title>Functions</title> + + <variablelist> + <varlistentry> + <term><function>pg_old_snapshot_time_mapping(array_offset OUT int4, end_timestamp OUT timestamptz, newest_xmin OUT xid) returns setof record</function></term> + <listitem> + <para> + Returns all of the entries in the server's timestamp to XID mapping. + Each entry represents the newest xmin of any snapshot taken in the + corresponding minute. + </para> + </listitem> + </varlistentry> + </variablelist> + </sect2> + +</sect1> |