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UPdate vacuum man page to be clearer.
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<!--
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.8 2000/04/05 21:51:11 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.9 2000/04/14 17:37:54 momjian Exp $
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Postgres documentation
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Postgres documentation
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-->
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@ -179,15 +179,15 @@ NOTICE: Index <replaceable class="PARAMETER">index</replaceable>: Pages 28;
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The open database is the target for <command>VACUUM</command>.
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The open database is the target for <command>VACUUM</command>.
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</para>
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</para>
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<para>
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<para>
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We recommend that active production databases be cleaned nightly, in order
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We recommend that active production databases be
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to keep statistics relatively current. The <command>VACUUM</command>
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<command>VACUUMM</command>-ed nightly, in order to keep remove
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query may be executed at any time, however. In particular, after
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expired rows. After copying a large class into
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copying a large class into <productname>Postgres</productname>
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<productname>Postgres</productname> or after deleting a large number
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or after deleting a large number of
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of records, it may be a good idea to issue a <command>VACUUM
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records, it may be a good idea to issue a <command>VACUUM ANALYZE</command>
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ANALYZE</command> query. This will update the system catalogs with
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query. This will update the system catalogs with the results of all
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the results of all recent changes, and allow the
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recent changes, and allow the <productname>Postgres</productname>
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<productname>Postgres</productname> query optimizer to make better
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query optimizer to make better choices in planning user queries.
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choices in planning user queries.
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</para>
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</para>
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</refsect2>
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</refsect2>
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