Welcome to the pg_reorg Project Home Page

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.

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

Documentations here.

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)