pg_repack/doc/index.html

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	<title>pg_reorg: Project Home Page</title>
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<center><img style="border: none; margin-left: auto; margin-right: auto; " src="http://pgfoundry.org/images/elephantSmall.png" height="75" width="75" />
<hr />
<h1>Welcome to the pg_reorg Project Home Page</h1>
<hr />
</center>
<p>
pg_reorg can re-organize tables on a postgres database without any locks so that you can retrieve or update rows in tables being reorganized.
The module is developed to be a better alternative of CLUSTER and VACUUM FULL.
</p>
<p>
The pg_reorg project is a <a href="http://www.postgresql.org">PostgreSQL</a> Community project that is a part of the <a href="http://pgfoundry.org">pgFoundry</a>.
</p>
<p>
The pgFoundry page for the project is at <a href="http://pgfoundry.org/projects/reorg">http://pgfoundry.org/projects/reorg</a>, 
where you can find <a href="http://pgfoundry.org/frs/?group_id=1000411">downloads</a>, documentation, bug reports, mailing lists, and a whole lot more.
</p>
<div>
<a href="index-ja.html">日本語のページはこちら。</a>
</div>
<hr />

<h2>Documentation</h2>
<p>
<a href="pg_reorg.html">Documentations here</a>.
</p>

<h2>Execution time</h2>
<p>
Here is a comparison between pg_reorg and clusterdb.
Clusterdb is faster on not fragmented conditions, but pg_reorg is faster on fully fragmented conditions.
Since reorganization is needed only if tables are fragmented, pg_reorg should be faster than clusterdb.
</p>

<center>
<div style="margin: 2em">
<img src="result.png" />
</div>

<table border="1">
<caption>Configuration</caption>
<tr>
	<th>Category</th>
	<th>Item</th>
	<th>Details</th>
</tr>
<tr>
	<td rowspan="3">Hardware</td>
	<td>CPU</td>
	<td>2 * Xeon 5160 3.00GHz (Dual core)</td>
</tr>
<tr>
	<td>Memory</td>
	<td>2GB</td>
</tr>
<tr>
	<td>Storage</td>
	<td>Ultra320 SCSI, 15000rpm (220GB)</td>
</tr>
<tr>
	<td rowspan="4">Software</td>
	<td>OS</td>
	<td>RHEL 5.2 (64bit) 2.6.18-92.el5</td>
</tr>
<tr>
	<td>DB</td>
	<td>PostgreSQL 8.3.3</td>
</tr>
<tr>
	<td>pg_reorg</td>
	<td>1.0.0</td>
</tr>
<tr>
	<td>clusterdb</td>
	<td>clusterdb (PostgreSQL) 8.3.3</td>
</tr>
<tr>
	<td rowspan="2">Data</td>
	<td>Scheme</td>
	<td><code><pre>CREATE TABLE tbl (
 id bigserial PRIMARY KEY,
 seqkey timestamp NOT NULL,
 rndkey timestamp NOT NULL,
 filler char(75) NOT NULL
);
CREATE INDEX idx_seq ON tbl (seqkey);
CREATE INDEX idx_rnd ON tbl (rndkey);</pre></code></td>
</tr>
<tr>
	<td>Rows</td>
	<td>16.5 M rows (2GB)</td>
</tr>
</table>

</center>

<hr />
<div align="right">
Copyright (c) 2008-2009, NIPPON TELEGRAPH AND TELEPHONE CORPORATION
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Modify LOCK to LOCK-NOWAIT-and-loop at swap tables to avoid holding exclusive locks long time. Suggested by Kenny Gorman. 2009-04-16 06:01:01 +00:00			`<?xml version="1.0" encoding="utf-8"?>`
			`<!DOCTYPE html`
			`PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"`
			`"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">`

			`<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">`
			`<head>`
			`<link rel="icon" type="image/png" href="http://pgfoundry.org/images/elephant-icon.png" />`
			`<link rel="stylesheet" type="text/css" href="style.css" />`
			`<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />`
			`<title>pg_reorg: Project Home Page</title>`
			`</head>`

			`<body>`
			`<center><img style="border: none; margin-left: auto; margin-right: auto; " src="http://pgfoundry.org/images/elephantSmall.png" height="75" width="75" />`
			`<hr />`
			`<h1>Welcome to the pg_reorg Project Home Page</h1>`
			`<hr />`
			`</center>`
			`<p>`
			`pg_reorg can re-organize tables on a postgres database without any locks so that you can retrieve or update rows in tables being reorganized.`
			`The module is developed to be a better alternative of CLUSTER and VACUUM FULL.`
			`</p>`
			`<p>`
			`The pg_reorg project is a <a href="http://www.postgresql.org">PostgreSQL</a> Community project that is a part of the <a href="http://pgfoundry.org">pgFoundry</a>.`
			`</p>`
			`<p>`
			`The pgFoundry page for the project is at <a href="http://pgfoundry.org/projects/reorg">http://pgfoundry.org/projects/reorg</a>,`
			`where you can find <a href="http://pgfoundry.org/frs/?group_id=1000411">downloads</a>, documentation, bug reports, mailing lists, and a whole lot more.`
			`</p>`
			`<div>`
			`<a href="index-ja.html">日本語のページはこちら。</a>`
			`</div>`
			`<hr />`

			`<h2>Documentation</h2>`
			`<p>`
			`<a href="pg_reorg.html">Documentations here</a>.`
			`</p>`

			`<h2>Execution time</h2>`
			`<p>`
			`Here is a comparison between pg_reorg and clusterdb.`
			`Clusterdb is faster on not fragmented conditions, but pg_reorg is faster on fully fragmented conditions.`
			`Since reorganization is needed only if tables are fragmented, pg_reorg should be faster than clusterdb.`
			`</p>`

			`<center>`
			`<div style="margin: 2em">`
			`<img src="result.png" />`
			`</div>`

			`<table border="1">`
			`<caption>Configuration</caption>`
			`<tr>`
			`<th>Category</th>`
			`<th>Item</th>`
			`<th>Details</th>`
			`</tr>`
			`<tr>`
			`<td rowspan="3">Hardware</td>`
			`<td>CPU</td>`
			`<td>2 * Xeon 5160 3.00GHz (Dual core)</td>`
			`</tr>`
			`<tr>`
			`<td>Memory</td>`
			`<td>2GB</td>`
			`</tr>`
			`<tr>`
			`<td>Storage</td>`
			`<td>Ultra320 SCSI, 15000rpm (220GB)</td>`
			`</tr>`
			`<tr>`
			`<td rowspan="4">Software</td>`
			`<td>OS</td>`
			`<td>RHEL 5.2 (64bit) 2.6.18-92.el5</td>`
			`</tr>`
			`<tr>`
			`<td>DB</td>`
			`<td>PostgreSQL 8.3.3</td>`
			`</tr>`
			`<tr>`
			`<td>pg_reorg</td>`
			`<td>1.0.0</td>`
			`</tr>`
			`<tr>`
			`<td>clusterdb</td>`
			`<td>clusterdb (PostgreSQL) 8.3.3</td>`
			`</tr>`
			`<tr>`
			`<td rowspan="2">Data</td>`
			`<td>Scheme</td>`
			`<td><code><pre>CREATE TABLE tbl (`
			`id bigserial PRIMARY KEY,`
			`seqkey timestamp NOT NULL,`
			`rndkey timestamp NOT NULL,`
			`filler char(75) NOT NULL`
			`);`
			`CREATE INDEX idx_seq ON tbl (seqkey);`
			`CREATE INDEX idx_rnd ON tbl (rndkey);</pre></code></td>`
			`</tr>`
			`<tr>`
			`<td>Rows</td>`
			`<td>16.5 M rows (2GB)</td>`
			`</tr>`
			`</table>`

			`</center>`

			`<hr />`
			`<div align="right">`
			`Copyright (c) 2008-2009, NIPPON TELEGRAPH AND TELEPHONE CORPORATION`
			`</div>`

			`<!-- PLEASE LEAVE "Powered By GForge" on your site -->`
			`<br />`
			`<center>`
			`<a href="http://gforge.org/"><img src="http://gforge.org/images/pow-gforge.png"`
			`alt="Powered By GForge Collaborative Development Environment" border="0" /></a>`
			`</center>`

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			`</html>`