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Postgres FD Implementation
Commit 85df43f3 authored by Bruce Momjian's avatar Bruce Momjian
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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
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (bruce@momjian.us)
Last updated: Mon May 28 19:56:23 EDT 2007
Last updated: Wed May 30 15:07:10 EDT 2007
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
......@@ -1169,8 +1168,8 @@ Vacuum
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.
http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php
http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php
* Reduce lock time during VACUUM FULL by moving tuples with read lock,
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">
<html>
<head>
<title>z</title>
<title>PostgreSQL TODO List</title>
<meta name="generator" content="HTML::TextToHTML v2.25"/>
</head>
<body bgcolor="#FFFFFF" text="#000000" link="#FF0000" vlink="#A00000" alink="#0000FF">
<p>z<br/>
PostgreSQL TODO List
</p><hr/>
Current maintainer: Bruce Momjian (<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>)<br/>
Last updated: Mon May 28 19:56:23 EDT 2007
<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: Wed May 30 15:07:10 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>.
</p>
......@@ -25,7 +23,7 @@ you would like to work on an item, please read the Developer's FAQ<br/>
first. There is also a developer's wiki at<br/>
<a href="http://developer.postgresql.org">http://developer.postgresql.org</a>.
</p>
<h1><a name="section_1">Administration</a></h1>
<h1><a name="section_2">Administration</a></h1>
<ul>
<li>Allow major upgrades without dump/reload, perhaps using pg_upgrade
......@@ -158,7 +156,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li></ul>
</li></ul>
<h1><a name="section_2">Monitoring</a></h1>
<h1><a name="section_3">Monitoring</a></h1>
<ul>
<li>Allow server log information to be output as INSERT statements
......@@ -167,7 +165,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li><li>-<em>Add ability to monitor the use of temporary sort files</em>
</li></ul>
<h1><a name="section_3">Data Types</a></h1>
<h1><a name="section_4">Data Types</a></h1>
<ul>
<li>-<em>Make 64-bit version of the MONEY data type</em>
......@@ -309,7 +307,7 @@ first. There is also a developer's wiki at<br/>
</li></ul>
</li></ul>
</li></ul>
<h1><a name="section_4">Functions</a></h1>
<h1><a name="section_5">Functions</a></h1>
<ul>
<li>Allow INET subnet tests using non-constants to be indexed
......@@ -365,7 +363,7 @@ first. There is also a developer's wiki at<br/>
e.g. box @&gt; point
</p>
</li></ul>
<h1><a name="section_5">Multi-Language Support</a></h1>
<h1><a name="section_6">Multi-Language Support</a></h1>
<ul>
<li>Add NCHAR (as distinguished from ordinary varchar),
......@@ -406,7 +404,7 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00767.php</a>
</p>
</li></ul>
<h1><a name="section_6">Views / Rules</a></h1>
<h1><a name="section_7">Views / Rules</a></h1>
<ul>
<li>Automatically create rules on views so they are updateable, per SQL99
......@@ -423,7 +421,7 @@ first. There is also a developer's wiki at<br/>
are added after the view is created.
</p>
</li></ul>
<h1><a name="section_7">SQL Commands</a></h1>
<h1><a name="section_8">SQL Commands</a></h1>
<ul>
<li>Add CORRESPONDING BY to UNION/INTERSECT/EXCEPT
......@@ -720,7 +718,7 @@ first. There is also a developer's wiki at<br/>
</li></ul>
</li></ul>
</li></ul>
<h1><a name="section_8">Clients</a></h1>
<h1><a name="section_9">Clients</a></h1>
<ul>
<li>Have pg_ctl look at PGHOST in case it is a socket directory?
......@@ -834,7 +832,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li></ul>
</p></ul>
<h1><a name="section_9">Triggers</a></h1>
<h1><a name="section_10">Triggers</a></h1>
<ul>
<li>Add deferred trigger queue file
......@@ -869,7 +867,7 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php">http://archives.postgresql.org/pgsql-general/2007-02/msg01466.php</a>
</p>
</li></ul>
<h1><a name="section_10">Dependency Checking</a></h1>
<h1><a name="section_11">Dependency Checking</a></h1>
<ul>
<li>-<em>Flush cached query plans when the dependent objects change or</em>
......@@ -878,7 +876,7 @@ first. There is also a developer's wiki at<br/>
</li><li>-<em>Invalidate prepared queries, like INSERT, when the table definition</em>
is altered
</li></ul>
<h1><a name="section_11">Indexes</a></h1>
<h1><a name="section_12">Indexes</a></h1>
<ul>
<li>Add UNIQUE capability to non-btree indexes
......@@ -951,7 +949,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li></ul>
</li></ul>
<h1><a name="section_12">Fsync</a></h1>
<h1><a name="section_13">Fsync</a></h1>
<ul>
<li>Improve commit_delay handling to reduce fsync()
......@@ -969,7 +967,7 @@ first. There is also a developer's wiki at<br/>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00079.php</a>
</p>
</li></ul>
<h1><a name="section_13">Cache Usage</a></h1>
<h1><a name="section_14">Cache Usage</a></h1>
<ul>
<li>Allow free-behind capability for large sequential scans, perhaps using
......@@ -1034,15 +1032,15 @@ first. There is also a developer's wiki at<br/>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php</a>
</p>
</li></ul>
<h1><a name="section_14">Vacuum</a></h1>
<h1><a name="section_15">Vacuum</a></h1>
<ul>
<li>Improve speed with indexes
<p> 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.
</p>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php</a>
<a href="http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php">http://archives.postgresql.org/pgsql-hackers/2007-03/msg00024.php</a>
<a href="http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php">http://archives.postgresql.org/pgsql-performance/2007-05/msg00296.php</a>
</p>
</li><li>Reduce lock time during VACUUM FULL by moving tuples with read lock,
then write lock and truncate table
......@@ -1104,7 +1102,7 @@ first. There is also a developer's wiki at<br/>
</p>
</li></ul>
</li></ul>
<h1><a name="section_15">Locking</a></h1>
<h1><a name="section_16">Locking</a></h1>
<ul>
<li>Fix priority ordering of read and write light-weight locks (Neil)
......@@ -1124,7 +1122,7 @@ first. There is also a developer's wiki at<br/>
</li><li>Add idle_in_transaction_timeout GUC so locks are not held for long
periods of time
</li></ul>
<h1><a name="section_16">Startup Time Improvements</a></h1>
<h1><a name="section_17">Startup Time Improvements</a></h1>
<ul>
<li>Experiment with multi-threaded backend for backend creation [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?thread">thread</a>]
......@@ -1147,7 +1145,7 @@ first. There is also a developer's wiki at<br/>
existing backends is one of the difficulties with a backend approach.
</p>
</li></ul>
<h1><a name="section_17">Write-Ahead Log</a></h1>
<h1><a name="section_18">Write-Ahead Log</a></h1>
<ul>
<li>Eliminate need to write full pages to WAL before page modification [<a href="http://momjian.postgresql.org/cgi-bin/pgtodo?wal">wal</a>]
......@@ -1213,7 +1211,7 @@ first. There is also a developer's wiki at<br/>
of indexes on TOAST tables.
</p>
</li></ul>
<h1><a name="section_18">Optimizer / Executor</a></h1>
<h1><a name="section_19">Optimizer / Executor</a></h1>
<ul>
<li>Improve selectivity functions for geometric operators
......@@ -1238,7 +1236,7 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00096.php</a>
</p>
</li></ul>
<h1><a name="section_19">Miscellaneous Performance</a></h1>
<h1><a name="section_20">Miscellaneous Performance</a></h1>
<ul>
<li>Do async I/O for faster random read-ahead of data
......@@ -1283,7 +1281,7 @@ first. There is also a developer's wiki at<br/>
<p> <a href="http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php">http://archives.postgresql.org/pgsql-hackers/2007-01/msg00752.php</a>
</p>
</li></ul>
<h1><a name="section_20">Source Code</a></h1>
<h1><a name="section_21">Source Code</a></h1>
<ul>
<li>Add use of 'const' for variables in source tree
......@@ -1368,7 +1366,7 @@ first. There is also a developer's wiki at<br/>
of result sets using new statement protocol
</li></ul>
</li></ul>
<h1><a name="section_21">Exotic Features</a></h1>
<h1><a name="section_22">Exotic Features</a></h1>
<ul>
<li>Add pre-parsing phase that converts non-ISO syntax to supported
......@@ -1396,7 +1394,7 @@ first. There is also a developer's wiki at<br/>
<a href="http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php">http://archives.postgresql.org/pgsql-hackers/2006-10/msg01527.php</a>
</p>
</li></ul>
<h1><a name="section_22">Features We Do <u>Not</u> Want</a></h1>
<h1><a name="section_23">Features We Do <u>Not</u> Want</a></h1>
<ul>
<li>All backends running as threads in a single process (not wanted)
......
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