Host memory required for this attack: 64 MB

[Dozen]

Hello, i get following message :  "Host memory required for this attack: 64 MB"  when start hashcat . 

OS : ubuntu x64 last version
CPU : Xeon GOLD
RAM : 1 GB
SSD : 25 GB

My hashcat parameters : 

sudo ./hashcat -O -m 15700 MyHashFile -w 3 -a 3 ga?d?d?d?d?d?d?d?d

So i can not solve this error "Host memory required for this attack: 64 MB"

Is there anyone have an idea ?