Sets the path of the directory to be used as the location of disk-backed region files. Region files created by the Memory Pool subsystem will be created in this directory. If no region directory is specified, region files are created in the environment home directory.

The syntax of this parameter in the DB_CONFIG file is a single line with the string set_region_dir, one or more whitespace characters, and the directory name.

For more information, see DbEnv::set_region_dir() .