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Ruby Enterprise Edition 1.8.6-20090201 released

By Hongli Lai on February 1st, 2009

What is Ruby Enterprise Edition?

Ruby Enterprise Edition (REE) is a server-oriented distribution of the official Ruby interpreter, and includes various additional enhancements. REE’s main benefits are the ability to reduce Ruby on Rails applications’ memory usage by 33% on average, the ability to increase applications’ performance and the inclusion of various analysis and debugging features. The lower memory usage and increased performance are possible because REE includes – among other enhancements – a copy-on-write friendly garbage collector, as well as an improved memory allocator. REE has been out for several months now and is already used by many high-profile websites and organizations, such as New York Times, Shopify and 37signals.

“We switched to enterprise ruby to get the full benefit of the [copy-on-write] memory characteristics and we can absolutely confirm the memory savings of 30% some others have reported. This is many thousand dollars of savings even at today’s hardware prices.”
Tobias Lütke (Shopify)

And just like Phusion Passenger, Ruby Enterprise Edition is 100% open source.


Version 1.8.6-20090201 is a minor bugfix release. The changes are as follows:

  • Fixed a memory corruption bug in the readline library. If you were having problems with readline or irb, try this release.
  • Preserve file attributes when installing tcmalloc. Symlinks are now properly copied as symlinks.
  • For those who do not want to or can’t use the REE installer, there are now manual installation instructions available.

Download & upgrade

To install Ruby Enterprise Edition, please visit the download page. To upgrade from a previous version, simply install into the same prefix that you installed to last time. Please also refer to the documentation for upgrade instructions.

Hongli Lai Ninh Bui