IFS Connect Inbound/Outbound Query re processed file size

Please check below community thread.
Connectivity message gets stuck in Connectivity Inbox Message queue #GSDTECH# | IFS Community

“There is no file size limitation for reading file but for processing JVM max heap size does matter. For a 2GB heap space you can process about 100 MB file. For larger files you will have to increase the heap space allocated for the Integration Server accordingly.”