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Add UPDATE entry for row reuse.

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>
> * Allow heap reuse of UPDATEd rows if old and new versions are on the
>   same heap page?
>
>   This is possible for same-page updates because a single index row
>   can point to both old and new values.
>   http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php
This commit is contained in:
Bruce Momjian 2006-06-24 23:45:02 +00:00
parent 50aa69a825
commit fc6a2293b5
2 changed files with 15 additions and 2 deletions
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9
doc/TODO
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@ -2,7 +2,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (bruce@momjian.us)
Last updated: Sun Jun 18 15:32:30 EDT 2006
Last updated: Sat Jun 24 19:44:48 EDT 2006
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
@ -1131,6 +1131,13 @@ Vacuum
http://archives.postgresql.org/pgsql-patches/2006-03/msg00142.php
* Allow heap reuse of UPDATEd rows if old and new versions are on the
same heap page?
This is possible for same-page updates because a single index row
can point to both old and new values.
http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php
* Auto-vacuum
o Use free-space map information to guide rfilling

8
doc/src/FAQ/TODO.html
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@ -8,7 +8,7 @@
<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
<h1><a name="section_1">PostgreSQL TODO List</a></h1>
<p>Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
Last updated: Sun Jun 18 15:32:30 EDT 2006
Last updated: Sat Jun 24 19:44:48 EDT 2006
</p>
<p>The most recent version of this document can be viewed at<br/>
<a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
@ -1019,6 +1019,12 @@ first.
in maintaining clustering?
</li><li>Consider shrinking expired tuples to just their headers
<p> <a href="http://archives.postgresql.org/pgsql-patches/2006-03/msg00142.php">http://archives.postgresql.org/pgsql-patches/2006-03/msg00142.php</a>
</p>
</li><li>Allow heap reuse of UPDATEd rows if old and new versions are on the
same heap page?
<p> This is possible for same-page updates because a single index row
can point to both old and new values.
<a href="http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php">http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php</a>
</p>
</li><li>Auto-vacuum
<ul>