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Convert documentation to DocBook XML
Since some preparation work had already been done, the only source changes left were changing empty-element tags like <xref linkend="foo"> to <xref linkend="foo"/>, and changing the DOCTYPE. The source files are still named *.sgml, but they are actually XML files now. Renaming could be considered later. In the build system, the intermediate step to convert from SGML to XML is removed. Everything is build straight from the source files again. The OpenSP (or the old SP) package is no longer needed. The documentation toolchain instructions are updated and are much simpler now. Peter Eisentraut, Alexander Lakhin, Jürgen Purtz
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@@ -111,7 +111,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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<para>
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In the default <productname>PostgreSQL</productname> configuration,
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the autovacuum daemon (see <xref linkend="autovacuum">)
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the autovacuum daemon (see <xref linkend="autovacuum"/>)
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takes care of automatic analyzing of tables when they are first loaded
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with data, and as they change throughout regular operation.
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When autovacuum is disabled,
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@@ -119,7 +119,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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just after making major changes in the contents of a table. Accurate
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statistics will help the planner to choose the most appropriate query
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plan, and thereby improve the speed of query processing. A common
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strategy for read-mostly databases is to run <xref linkend="sql-vacuum">
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strategy for read-mostly databases is to run <xref linkend="sql-vacuum"/>
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and <command>ANALYZE</command> once a day during a low-usage time of day.
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(This will not be sufficient if there is heavy update activity.)
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</para>
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@@ -139,7 +139,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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in a unique-key column, there are no common values) or if the
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column data type does not support the appropriate operators. There
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is more information about the statistics in <xref
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linkend="maintenance">.
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linkend="maintenance"/>.
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</para>
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<para>
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@@ -150,7 +150,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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will change slightly each time <command>ANALYZE</command> is run,
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even if the actual table contents did not change. This might result
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in small changes in the planner's estimated costs shown by
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<xref linkend="sql-explain">.
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<xref linkend="sql-explain"/>.
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In rare situations, this non-determinism will cause the planner's
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choices of query plans to change after <command>ANALYZE</command> is run.
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To avoid this, raise the amount of statistics collected by
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@@ -159,10 +159,10 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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<para>
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The extent of analysis can be controlled by adjusting the
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<xref linkend="guc-default-statistics-target"> configuration variable, or
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<xref linkend="guc-default-statistics-target"/> configuration variable, or
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on a column-by-column basis by setting the per-column statistics
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target with <command>ALTER TABLE ... ALTER COLUMN ... SET
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STATISTICS</command> (see <xref linkend="sql-altertable">).
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STATISTICS</command> (see <xref linkend="sql-altertable"/>).
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The target value sets the
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maximum number of entries in the most-common-value list and the
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maximum number of bins in the histogram. The default target value
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@@ -192,7 +192,7 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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bad query plans, a more accurate value can be determined manually and then
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installed with
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<command>ALTER TABLE ... ALTER COLUMN ... SET (n_distinct = ...)</command>
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(see <xref linkend="sql-altertable">).
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(see <xref linkend="sql-altertable"/>).
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</para>
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<para>
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@@ -233,10 +233,10 @@ ANALYZE [ VERBOSE ] [ <replaceable class="parameter">table_and_columns</replacea
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="sql-vacuum"></member>
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<member><xref linkend="app-vacuumdb"></member>
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<member><xref linkend="runtime-config-resource-vacuum-cost"></member>
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<member><xref linkend="autovacuum"></member>
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<member><xref linkend="sql-vacuum"/></member>
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<member><xref linkend="app-vacuumdb"/></member>
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<member><xref linkend="runtime-config-resource-vacuum-cost"/></member>
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<member><xref linkend="autovacuum"/></member>
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</simplelist>
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</refsect1>
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</refentry>
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