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< title > pg_reorg: Project Home Page< / title >
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< h1 > Welcome to the pg_reorg Project Home Page< / h1 >
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This project provides two tools for PostgreSQL; < strong > pg_reorg< / strong > and < strong > pg_batch< / strong > .
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< strong > pg_reorg< / strong > 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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< strong > pg_batch< / strong > is a SQL job executor program for PostgreSQL.
It generates job list from an external SQL script file, and execute the jobs in serial or parallel.
It can be used as "a better vacuumdb" with the attached script to run VACUUM.
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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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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.
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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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< h2 > Documentation< / h2 >
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< li > < a href = "pg_reorg.html" > pg_reorg 1.1 documentation< / a > < / li >
< li > < a href = "pg_batch.html" > pg_batch 1.2 documentation< / a > < / li >
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< h2 > Execution time< / h2 >
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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.
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< caption > Configuration< / caption >
< tr >
< th > Category< / th >
< th > Item< / th >
< th > Details< / th >
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< tr >
< td rowspan = "3" > Hardware< / td >
< td > CPU< / td >
< td > 2 * Xeon 5160 3.00GHz (Dual core)< / td >
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< tr >
< td > Memory< / td >
< td > 2GB< / td >
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< tr >
< td > Storage< / td >
< td > Ultra320 SCSI, 15000rpm (220GB)< / td >
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< tr >
< td rowspan = "4" > Software< / td >
< td > OS< / td >
< td > RHEL 5.2 (64bit) 2.6.18-92.el5< / td >
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< tr >
< td > DB< / td >
< td > PostgreSQL 8.3.3< / td >
< / tr >
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< td > pg_reorg< / td >
< td > 1.0.0< / td >
< / tr >
< tr >
< td > clusterdb< / td >
< td > clusterdb (PostgreSQL) 8.3.3< / td >
< / tr >
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< 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 >
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< td > Rows< / td >
< td > 16.5 M rows (2GB)< / td >
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< hr / >
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< p class = "footer" >
Portions Copyright (c) 2008-2011, NIPPON TELEGRAPH AND TELEPHONE CORPORATION< br / >
Portions Copyright (c) 2011, Itagaki Takahiro
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