README - Advanced Model Settings

[gimler]

i think this text is deprecated you can use the --limit option of the :update-model task the config option is not used
"Further, sfLucene optimizes memory usage when rebuilding the index from the database by using both an internal pager and hydrating objects on demand. By default, rows are selected in batches of 250, but if you require this to be different, you can customize it like so:"