pio batch import imports only 20 events!

[Alexey Grachev]

Hello, I try to import a well formed file to the event server with this 
command:

pio import --appid 1 --input dataset_prepared_for_training.json


I have about 500000 events, but pio imports only 20! where can i set up 
the limit to, say, 1mln?


Thanks a lot!


Alexey