pg_lz4 extension

lz4 compression for PostgreSQL

Requirements

This extension only works with developement version of PostgreSQL with custom compression methods patch applied: https://www.postgresql.org/message-id/20190315125203.5da43edb%40ildus-work.localdomain

Also liblz4 is required to build and use this extension.

Installation

To install pg_lz4 extension run:

make install

or if your PostgreSQL bin directory isn't in PATH:

make install PG_CONFIG=/path/to/your/postgres/bin/pg_config

Usage

First, create pg_lz4 extension:

CREATE EXTENSION pg_lz4;

Now you can specify pg_lz4 compression when defining new tables:

CREATE TABLE mytable (
	id SERIAL,
	data1 TEXT COMPRESSION pg_lz4,
	data2 TEXT
);

or enable compression for existing table columns:

ALTER TABLE mytable ALTER COLUMN data2 SET COMPRESSION pg_lz4;

You can also specify acceleration parameter for lz4 algorithm (see lz4 documentation for more information):

ALTER TABLE mytable ALTER COLUMN data2 SET COMPRESSION pg_lz4 WITH (acceleration '8');