I finally found something that made sense and I hope this helps... each web server only allows a certain amount of memory to be allocated to a particular PHP process - some hosts are more generous than others. If you upload smaller files, less memory will be needed during the import process. Thus, if you upload smaller files, you can do more without running into issues.
That said, it would be nice if Plogger could understand when it was running out of memory and batch the job in pieces using available memory... this issue is highly annoying.
I am getting this same issue. I did bump up my resources a bit but still get that error. I am on a shared hosting plan but can change my resources a bit since I work here. I doubled the ram usage and upped the cpu cycles by 4.