Update hash warning in manual.
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.32 2002/06/21 03:25:53 momjian Exp $ -->
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<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.33 2002/06/21 16:52:00 momjian Exp $ -->
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<chapter id="indexes">
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<title id="indexes-title">Indexes</title>
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@ -181,9 +181,10 @@ CREATE INDEX <replaceable>name</replaceable> ON <replaceable>table</replaceable>
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</synopsis>
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<note>
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<para>
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Testing has shown that hash indexes are slower than btree indexes,
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and the size and build time for hash indexes is much worse. For
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these reasons, hash index use is discouraged.
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Testing has shown hash indexes to be similar or slower than btree
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indexes, and the index size and build time for hash indexes is much
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worse. Hash indexes also suffer poor performance under high
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concurrency. For these reasons, hash index use is discouraged.
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</para>
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</note>
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</para>
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_index.sgml,v 1.32 2002/06/21 03:25:53 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_index.sgml,v 1.33 2002/06/21 16:52:00 momjian Exp $
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PostgreSQL documentation
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-->
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@ -330,9 +330,10 @@ ERROR: Cannot create index: 'index_name' already exists.
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the <literal>=</literal> operator.
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</para>
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<para>
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Testing has shown that hash indexes are slower than btree indexes,
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and the size and build time for hash indexes is much worse. For
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these reasons, hash index use is discouraged.
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Testing has shown hash indexes to be similar or slower than btree
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indexes, and the index size and build time for hash indexes is much
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worse. Hash indexes also suffer poor performance under high
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concurrency. For these reasons, hash index use is discouraged.
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</para>
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<para>
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