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体验新版 GitCode,发现更多精彩内容 >>
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a676d7f6
编写于
9月 19, 2006
作者:
B
Bruce Momjian
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More 8.2 release item reordering.
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doc/src/sgml/release.sgml
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a676d7f6
<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.44
0 2006/09/19 02:08:30
momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.44
1 2006/09/19 02:25:13
momjian Exp $ -->
<!--
Typical markup:
...
...
@@ -340,117 +340,117 @@ For new features, add links to the documentation sections.
<listitem>
<para>
Reduce locking requirements of sequential scans (Qingqing
Zhou
)
Increase default values for <envar>shared_buffers</> and
<envar>max_fsm_pages</>(Andrew
)
</para>
</listitem>
<listitem>
<para>
Improve subtransaction performance (Alvaro, Itagaki Takahiro,
Tom)
Improve sorting speed and reduce memory usage (Simon, Tom)
</para>
</listitem>
<listitem>
<para>
Improve
locking performance by breaking locks into sections
(
Tom)
Improve
subtransaction performance (Alvaro, Itagaki Takahiro,
Tom)
</para>
</listitem>
<listitem>
<para>
This allows locking to be more fine-grained, reducing
contention.
Improve <command>COPY</> performance (Alon Goldshuv, Tom)
</para>
</listitem>
<listitem>
<para>
A
llow the planner to re-order <literal>OUTER JOIN</>s whe
n
possible (Tom
)
A
dd <literal>FILLFACTOR</> to table and index creatio
n
(ITAGAKI Takahiro
)
</para>
<para>
This makes a considerable difference for queries involving
multiple outer joins.
This adds extra free space to each heap or index page,
allowing improved performance as the database grows. This
is particularly valuable to maintain <command>CLUSTER</>ing.
</para>
</listitem>
<listitem>
<para>
Improve planning of joins to inherited tables and <literal>UNION
ALL</> views (Tom)
Improve locking performance by breaking locks into sections
(Tom)
</para>
<para>
This allows locking to be more fine-grained, reducing
contention.
</para>
</listitem>
<listitem>
<para>
Increase default values for <envar>shared_buffers</> and
<envar>max_fsm_pages</>(Andrew
)
Reduce locking requirements of sequential scans (Qingqing
Zhou
)
</para>
</listitem>
<listitem>
<para>
Improve the optimizer statistics used by <literal>LIKE</>,
<literal>ILIKE</>, and regular expression operations
(Tom)
Reduce locking required for database creation and destruction
(Tom)
</para>
</listitem>
<listitem>
<para>
Allow
constraint exclusion to be applied to inherited
<command>UPDATE</>/<command>DELETE</> queries
(Tom)
Allow
the planner to re-order <literal>OUTER JOIN</>s when
possible
(Tom)
</para>
<para>
<command>SELECT</> already honored constraint exclusion.
This makes a considerable difference for queries involving
multiple outer joins.
</para>
</listitem>
<listitem>
<para>
Improve sorting speed and reduce memory usage (Simon, Tom)
Improve the optimizer statistics used by <literal>LIKE</>,
<literal>ILIKE</>, and regular expression operations (Tom)
</para>
</listitem>
<listitem>
<para>
<function>MIN()</>/<function>MAX()</> can now use indexes
in more case
s (Tom)
Improve planning of joins to inherited tables and <literal>UNION
ALL</> view
s (Tom)
</para>
</listitem>
<listitem>
<para>
Improve concurrency for database creation and destruction
(Tom)
Allow constraint exclusion to be applied to inherited
<command>UPDATE</>/<command>DELETE</> queries
(Tom)
</para>
</listitem>
<listitem>
<para>
Speed up vacuuming of btree indexes (Heikki Linnakangas,
Tom)
<command>SELECT</> already honored constraint exclusion.
</para>
</listitem>
<listitem>
<para>
Improve <command>COPY</> performance (Alon Goldshuv, Tom)
<function>MIN()</>/<function>MAX()</> can now use indexes
in more cases (Tom)
</para>
</listitem>
<listitem>
<para>
Add <literal>FILLFACTOR</> to table and index creation
(ITAGAKI Takahiro)
</para>
<para>
This adds extra free space to each heap or index page,
allowing improved performance as the database grows. This
is particularly valuable to maintain <command>CLUSTER</>ing.
Speed up vacuuming of btree indexes (Heikki Linnakangas,
Tom)
</para>
</listitem>
...
...
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