If the input data type is feature class, the size limitation depends on the service task output download size, not the upload size. If the size of the upload data or file is larger than 64 MB, you get error messages from the Result window and service crash information from ArcGIS Server logs after uploading. If the input data type is raster or file, the upload size limitation is 64 MB, which is the default heap size. The limitation depends on which data type you upload. When you consume a geoprocessing service through ArcGIS Desktop, if the task contains input parameters that require you to provide datasets or files to upload, you need to be aware that there is a size limitation.
Upload large datasets from ArcGIS Desktop
