Welcome to the pg_reorg Project Home Page

This project provides two tools for PostgreSQL; pg_reorg and pg_batch.

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.

pg_batch 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.

The pg_reorg project is a PostgreSQL Community project that is a part of the pgFoundry.

The pgFoundry page for the project is at http://pgfoundry.org/projects/reorg, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.

日本語のページはこちら。

Documentation

Execution time

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.

Configuration
Category	Item	Details
Hardware	CPU	2 * Xeon 5160 3.00GHz (Dual core)
	Memory	2GB
	Storage	Ultra320 SCSI, 15000rpm (220GB)
Software	OS	RHEL 5.2 (64bit) 2.6.18-92.el5
	DB	PostgreSQL 8.3.3
	pg_reorg	1.0.0
	clusterdb	clusterdb (PostgreSQL) 8.3.3
Data	Scheme	`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);`
Data	Rows	16.5 M rows (2GB)