From 1415a8388f2912ea4618a4eeaf40ed11fa808bdc Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Fri, 21 Jun 2002 16:52:00 +0000
Subject: [PATCH] Update hash warning in manual.
---
doc/src/sgml/indices.sgml | 9 +++++----
doc/src/sgml/ref/create_index.sgml | 9 +++++----
2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/doc/src/sgml/indices.sgml b/doc/src/sgml/indices.sgml
index 6317e4ea749..214764a4a6c 100644
--- a/doc/src/sgml/indices.sgml
+++ b/doc/src/sgml/indices.sgml
@@ -1,4 +1,4 @@
-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.32 2002/06/21 03:25:53 momjian Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/indices.sgml,v 1.33 2002/06/21 16:52:00 momjian Exp $ -->
<chapter id="indexes">
<title id="indexes-title">Indexes</title>
@@ -181,9 +181,10 @@ CREATE INDEX <replaceable>name</replaceable> ON <replaceable>table</replaceable>
</synopsis>
<note>
<para>
- Testing has shown that hash indexes are slower than btree indexes,
- and the size and build time for hash indexes is much worse. For
- these reasons, hash index use is discouraged.
+ Testing has shown hash indexes to be similar or slower than btree
+ indexes, and the index size and build time for hash indexes is much
+ worse. Hash indexes also suffer poor performance under high
+ concurrency. For these reasons, hash index use is discouraged.
</para>
</note>
</para>
diff --git a/doc/src/sgml/ref/create_index.sgml b/doc/src/sgml/ref/create_index.sgml
index 6bb972e988e..62963c21724 100644
--- a/doc/src/sgml/ref/create_index.sgml
+++ b/doc/src/sgml/ref/create_index.sgml
@@ -1,5 +1,5 @@
<!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_index.sgml,v 1.32 2002/06/21 03:25:53 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_index.sgml,v 1.33 2002/06/21 16:52:00 momjian Exp $
PostgreSQL documentation
-->
@@ -330,9 +330,10 @@ ERROR: Cannot create index: 'index_name' already exists.
the <literal>=</literal> operator.
</para>
<para>
- Testing has shown that hash indexes are slower than btree indexes,
- and the size and build time for hash indexes is much worse. For
- these reasons, hash index use is discouraged.
+ Testing has shown hash indexes to be similar or slower than btree
+ indexes, and the index size and build time for hash indexes is much
+ worse. Hash indexes also suffer poor performance under high
+ concurrency. For these reasons, hash index use is discouraged.
</para>
<para>
--
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