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Done: 

> * -Consider shrinking expired tuples to just their headers
> * -Allow heap reuse of UPDATEd rows if no indexed columns are changed,
>   and old and new versions are on the same heap page

Not needed anymore:

< * Reuse index tuples that point to heap tuples that are not visible to
<   anyone?
This commit is contained in:
Bruce Momjian 2007-09-20 18:54:19 +00:00
parent ad8fbb549a
commit 754838caa3
2 changed files with 8 additions and 36 deletions
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23
doc/TODO
View File

@ -1,7 +1,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (bruce@momjian.us)
Last updated: Fri Sep 14 15:02:41 EDT 2007
Last updated: Thu Sep 20 14:53:32 EDT 2007
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
@ -1208,24 +1208,9 @@ Vacuum
in hopes that empty pages at the end can be truncated by VACUUM
* Allow FSM page return free space based on table clustering, to assist
in maintaining clustering?
* Consider shrinking expired tuples to just their headers
http://archives.postgresql.org/pgsql-patches/2006-03/msg00142.php
http://archives.postgresql.org/pgsql-hackers/2007-01/msg01025.php
* Allow heap reuse of UPDATEd rows if no indexed columns are changed,
and old and new versions are on the same heap page?
While vacuum handles DELETEs fine, updating of non-indexed columns, like
counters, are difficult for VACUUM to handle efficiently. This method
is possible for same-page updates because a single index row can be
used to point to both old and new values.
http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php
http://archives.postgresql.org/pgsql-hackers/2006-06/msg01534.php
* Reuse index tuples that point to heap tuples that are not visible to
anyone?
* -Consider shrinking expired tuples to just their headers
* -Allow heap reuse of UPDATEd rows if no indexed columns are changed,
and old and new versions are on the same heap page
* Improve dead row detection during multi-statement transactions usage
http://archives.postgresql.org/pgsql-patches/2007-03/msg00358.php

21
doc/src/FAQ/TODO.html
View File

@ -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: Fri Sep 14 15:02:41 EDT 2007
Last updated: Thu Sep 20 14:53:32 EDT 2007
</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>.
@ -1075,22 +1075,9 @@ first. There is also a developer's wiki at<br/>
in hopes that empty pages at the end can be truncated by VACUUM
</li><li>Allow FSM page return free space based on table clustering, to assist
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>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg01025.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg01025.php</a>
</p>
</li><li>Allow heap reuse of UPDATEd rows if no indexed columns are changed,
and old and new versions are on the same heap page?
<p> While vacuum handles DELETEs fine, updating of non-indexed columns, like
counters, are difficult for VACUUM to handle efficiently. This method
is possible for same-page updates because a single index row can be
used to point to both old and new values.
</p>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php">http://archives.postgresql.org/pgsql-hackers/2006-06/msg01305.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2006-06/msg01534.php">http://archives.postgresql.org/pgsql-hackers/2006-06/msg01534.php</a>
</p>
</li><li>Reuse index tuples that point to heap tuples that are not visible to
anyone?
</li><li>-<em>Consider shrinking expired tuples to just their headers</em>
</li><li>-<em>Allow heap reuse of UPDATEd rows if no indexed columns are changed,</em>
and old and new versions are on the same heap page
</li><li>Improve dead row detection during multi-statement transactions usage
<p> <a href="http://archives.postgresql.org/pgsql-patches/2007-03/msg00358.php">http://archives.postgresql.org/pgsql-patches/2007-03/msg00358.php</a>
</p>