Manual:$wgGenerateThumbnailOnParse/zh

细节
允许在访问页面时生成缩略图. 如果此项设置为false，那么缩略图URL仍然会被输出，但是不会在目标路径生成文件. This may save some time if you have a  or 404 handler set up which is faster than the regular webserver(s).

Setting this to true is equivalent to setting the  property in   and   to false.