Comment 1 for bug 858945

Quoting revision comments for RN and documentation updates:

"
This fix makes all functionality provided by
innodb_expand_fast_index_creation.patch disabled by default.

It can be enabled by using a new system variable,
innodb_expand_fast_index_creation, that has both global or session
scopes, and can also be specified in a configuration file or on the
command line. The variable is of the boolean type and is FALSE by
default. The session value of TRUE enables optimizations and
improvements provided by the patch. The variable also has no effect when
fast index creation is disabled with the fast_index_creation option
provided by control_online_alter_index.patch.
"