Using UTL_COMPRESS Results in Poor Compression Ratio (Doc ID 1055822.1)

Last updated on JULY 05, 2017

Applies to:

PL/SQL - Version: 10.2.0.3 to 11.1.0.7 - Release: 10.2 to 11.1
Information in this document applies to any platform.

Symptoms

Compressing  files with UTL_COMPRESS results in a very poor compression ratio.
A JAVA utility via a java stored procedure has a compression ratio of 1:20,  also GZIP delivers a
compression ratio of 1:20.
UTL_COMPRESS only delivers a compression ratio of 1:2.
With this compression ratio much more disk space is required.

Cause

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