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-rw-r--r--doc/src/sgml/ref/vacuumdb.sgml20
1 files changed, 20 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/vacuumdb.sgml b/doc/src/sgml/ref/vacuumdb.sgml
index 1c519f5944f..3ecd9999812 100644
--- a/doc/src/sgml/ref/vacuumdb.sgml
+++ b/doc/src/sgml/ref/vacuumdb.sgml
@@ -204,6 +204,26 @@ PostgreSQL documentation
</varlistentry>
<varlistentry>
+ <term><option>--analyze-in-stages</option></term>
+ <listitem>
+ <para>
+ Only calculate statistics for use by the optimizer (no vacuum),
+ like <option>--analyze-only</option>. Run several (currently three)
+ stages of analyze with different configuration settings, to produce
+ usable statistics faster.
+ </para>
+
+ <para>
+ This option is useful to analyze a database that was newly populated
+ from a restored dump or by <command>pg_upgrade</command>. This option
+ will try to create some statistics as fast as possible, to make the
+ database usable, and then produce full statistics in the subsequent
+ stages.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>-?</></term>
<term><option>--help</></term>
<listitem>