124 lines
3.5 KiB
HTML
Executable File
124 lines
3.5 KiB
HTML
Executable File
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<link rel="icon" type="image/png" href="http://pgfoundry.org/images/elephant-icon.png" />
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<link rel="stylesheet" type="text/css" href="style.css" />
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>pg_reorg: Project Home Page</title>
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</head>
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<body>
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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" />
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<hr />
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<h1>Welcome to the pg_reorg Project Home Page</h1>
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<hr />
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</center>
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<p>
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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.
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The module is developed to be a better alternative of CLUSTER and VACUUM FULL.
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</p>
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<p>
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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>.
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</p>
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<p>
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The pgFoundry page for the project is at <a href="http://pgfoundry.org/projects/reorg">http://pgfoundry.org/projects/reorg</a>,
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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.
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</p>
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<div>
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<a href="index-ja.html">日本語のページはこちら。</a>
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</div>
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<hr />
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<h2>Documentation</h2>
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<p>
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<a href="pg_reorg.html">Documentations here</a>.
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</p>
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<h2>Execution time</h2>
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<p>
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Here is a comparison between pg_reorg and clusterdb.
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Clusterdb is faster on not fragmented conditions, but pg_reorg is faster on fully fragmented conditions.
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Since reorganization is needed only if tables are fragmented, pg_reorg should be faster than clusterdb.
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</p>
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<center>
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<div style="margin: 2em">
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<img src="result.png" />
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</div>
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<table border="1">
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<caption>Configuration</caption>
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<tr>
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<th>Category</th>
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<th>Item</th>
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<th>Details</th>
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</tr>
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<tr>
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<td rowspan="3">Hardware</td>
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<td>CPU</td>
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<td>2 * Xeon 5160 3.00GHz (Dual core)</td>
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</tr>
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<tr>
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<td>Memory</td>
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<td>2GB</td>
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</tr>
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<tr>
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<td>Storage</td>
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<td>Ultra320 SCSI, 15000rpm (220GB)</td>
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</tr>
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<tr>
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<td rowspan="4">Software</td>
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<td>OS</td>
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<td>RHEL 5.2 (64bit) 2.6.18-92.el5</td>
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</tr>
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<tr>
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<td>DB</td>
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<td>PostgreSQL 8.3.3</td>
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</tr>
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<tr>
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<td>pg_reorg</td>
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<td>1.0.0</td>
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</tr>
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<tr>
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<td>clusterdb</td>
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<td>clusterdb (PostgreSQL) 8.3.3</td>
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</tr>
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<tr>
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<td rowspan="2">Data</td>
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<td>Scheme</td>
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<td><code><pre>CREATE TABLE tbl (
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id bigserial PRIMARY KEY,
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seqkey timestamp NOT NULL,
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rndkey timestamp NOT NULL,
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filler char(75) NOT NULL
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);
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CREATE INDEX idx_seq ON tbl (seqkey);
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CREATE INDEX idx_rnd ON tbl (rndkey);</pre></code></td>
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</tr>
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<tr>
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<td>Rows</td>
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<td>16.5 M rows (2GB)</td>
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</tr>
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</table>
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</center>
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<hr />
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<p class="footer">Copyright (c) 2008-2009, NIPPON TELEGRAPH AND TELEPHONE CORPORATION</p>
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<script type="text/javascript">
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</script>
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<script type="text/javascript">
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try {
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var pageTracker = _gat._getTracker("UA-10244036-4");
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pageTracker._trackPageview();
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} catch(err) {}</script>
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</body>
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</html>
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