<listitem>

<para>

Only analyze relations that are missing statistics for a column, index

expression, or extended statistics object. This option prevents

<application>vacuumdb</application> from deleting existing statistics

so that the query optimizer's choices do not become transiently worse.

expression, or extended statistics object. When used with

<option>--analyze-in-stages</option>, this option prevents

<application>vacuumdb</application> from temporarily replacing existing

statistics with ones generated with lower statistics targets, thus

avoiding transiently worse query optimizer choices.

</para>

<para>

This option can only be used in conjunction with