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* Improve speed with indexes For large table adjustments during VACUUM FULL, it is faster to cluster or reindex rather than update the index. Also, index updates can bloat the index.
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‎doc/TODO

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z
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PostgreSQL TODO List
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====================
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Current maintainer: Bruce Momjian (bruce@momjian.us)
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Last updated: Mon May 28 19:56:23 EDT 2007
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Last updated: Wed May 30 15:07:10 EDT 2007
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The most recent version of this document can be viewed at
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http://www.postgresql.org/docs/faqs.TODO.html.
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For large table adjustments during VACUUM FULL, it is faster to cluster
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or reindex rather than update the index. Also, index updates can bloat
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the index.
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http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php
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http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php
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* Reduce lock time during VACUUM FULL by moving tuples with read lock,
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then write lock and truncate table

‎doc/src/FAQ/TODO.html

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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html>
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<head>
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<title>z</title>
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<title>PostgreSQL TODO List</title>
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<meta name="generator" content="HTML::TextToHTML v2.25"/>
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</head>
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<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
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<p>z<br/>
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PostgreSQL TODO List
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</p><hr/>
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Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
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Last updated: Mon May 28 19:56:23 EDT 2007
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<h1><a name="section_1">PostgreSQL TODO List</a></h1>
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<p>Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
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Last updated: Wed May 30 15:07:10 EDT 2007
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</p>
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<p>The most recent version of this document can be viewed at<br/>
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<a href="http://www.postgresql.org/docs/faqs.TODO.html">http://www.postgresql.org/docs/faqs.TODO.html</a>.
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</p>
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first. There is also a developer's wiki at<br/>
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<a href="http://developer.postgresql.org">http://developer.postgresql.org</a>.
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</p>
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<h1><a name="section_1">Administration</a></h1>
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<h1><a name="section_2">Administration</a></h1>
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<ul>
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<li>Allow major upgrades without dump/reload, perhaps using pg_upgrade
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</p>
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</li></ul>
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</li></ul>
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<h1><a name="section_2">Monitoring</a></h1>
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<h1><a name="section_3">Monitoring</a></h1>
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<ul>
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<li>Allow server log information to be output as INSERT statements
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</p>
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</li><li>-<em>Add ability to monitor the use of temporary sort files</em>
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</li></ul>
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<h1><a name="section_3">Data Types</a></h1>
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<h1><a name="section_4">Data Types</a></h1>
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<ul>
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<li>-<em>Make 64-bit version of the MONEY data type</em>
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</li></ul>
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</li></ul>
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</li></ul>
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<h1><a name="section_4">Functions</a></h1>
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<h1><a name="section_5">Functions</a></h1>
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<ul>
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<li>Allow INET subnet tests using non-constants to be indexed
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e.g. box @&gt; point
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</p>
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</li></ul>
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<h1><a name="section_5">Multi-Language Support</a></h1>
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<h1><a name="section_6">Multi-Language Support</a></h1>
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<ul>
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<li>Add NCHAR (as distinguished from ordinary varchar),
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<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php</a>
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</p>
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</li></ul>
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<h1><a name="section_6">Views / Rules</a></h1>
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<h1><a name="section_7">Views / Rules</a></h1>
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<ul>
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<li>Automatically create rules on views so they are updateable, per SQL99
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are added after the view is created.
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</p>
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</li></ul>
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<h1><a name="section_7">SQL Commands</a></h1>
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<h1><a name="section_8">SQL Commands</a></h1>
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<li>Add CORRESPONDING BY to UNION/INTERSECT/EXCEPT
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</li></ul>
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</li></ul>
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</li></ul>
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<h1><a name="section_8">Clients</a></h1>
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<h1><a name="section_9">Clients</a></h1>
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<ul>
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<li>Have pg_ctl look at PGHOST in case it is a socket directory?
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</p>
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</li></ul>
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</p></ul>
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<h1><a name="section_9">Triggers</a></h1>
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<h1><a name="section_10">Triggers</a></h1>
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<p> <a href="http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php">http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php</a>
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</p>
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</li></ul>
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<h1><a name="section_10">Dependency Checking</a></h1>
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<h1><a name="section_11">Dependency Checking</a></h1>
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<li>-<em>Flush cached query plans when the dependent objects change or</em>
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</li><li>-<em>Invalidate prepared queries, like INSERT, when the table definition</em>
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is altered
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</li></ul>
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<h1><a name="section_11">Indexes</a></h1>
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<h1><a name="section_12">Indexes</a></h1>
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<li>Add UNIQUE capability to non-btree indexes
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</p>
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</li></ul>
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<h1><a name="section_12">Fsync</a></h1>
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<h1><a name="section_13">Fsync</a></h1>
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<li>Improve commit_delay handling to reduce fsync()
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<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php</a>
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</p>
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<h1><a name="section_13">Cache Usage</a></h1>
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<h1><a name="section_14">Cache Usage</a></h1>
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</p>
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<h1><a name="section_14">Vacuum</a></h1>
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<h1><a name="section_15">Vacuum</a></h1>
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<li>Improve speed with indexes
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<p> For large table adjustments during VACUUM FULL, it is faster to cluster
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or reindex rather than update the index. Also, index updates can bloat
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the index.
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</p>
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<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php</a>
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<a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php</a>
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<a href="http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php">http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php</a>
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</li><li>Reduce lock time during VACUUM FULL by moving tuples with read lock,
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then write lock and truncate table
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</p>
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<h1><a name="section_15">Locking</a></h1>
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<h1><a name="section_16">Locking</a></h1>
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<li>Fix priority ordering of read and write light-weight locks (Neil)
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periods of time
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<h1><a name="section_16">Startup Time Improvements</a></h1>
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<h1><a name="section_17">Startup Time Improvements</a></h1>
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<ul>
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<li>Experiment with multi-threaded backend for backend creation [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?thread">thread</a>]
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existing backends is one of the difficulties with a backend approach.
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</p>
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<h1><a name="section_17">Write-Ahead Log</a></h1>
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<h1><a name="section_18">Write-Ahead Log</a></h1>
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<ul>
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<li>Eliminate need to write full pages to WAL before page modification [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?wal">wal</a>]
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of indexes on TOAST tables.
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</p>
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<h1><a name="section_18">Optimizer / Executor</a></h1>
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<h1><a name="section_19">Optimizer / Executor</a></h1>
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<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php</a>
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</p>
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<h1><a name="section_19">Miscellaneous Performance</a></h1>
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<h1><a name="section_20">Miscellaneous Performance</a></h1>
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<li>Do async I/O for faster random read-ahead of data
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<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php</a>
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</p>
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<h1><a name="section_20">Source Code</a></h1>
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<h1><a name="section_21">Source Code</a></h1>
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of result sets using new statement protocol
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<h1><a name="section_21">Exotic Features</a></h1>
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<h1><a name="section_22">Exotic Features</a></h1>
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<a href="http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php">http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php</a>
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</p>
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<h1><a name="section_22">Features We Do <u>Not</u> Want</a></h1>
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<h1><a name="section_23">Features We Do <u>Not</u> Want</a></h1>
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<ul>
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<li>All backends running as threads in a single process (not wanted)

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