OVH VPS MySQL Crashing

Hi, i have a OVH vps (ubuntu 20.04) and mysql keep crashing every few hours, site go down and i have to restart the service manually everytime it happen. In error log i see something about "InnoDB" and maybe out of memory killer stopping mysqld process. Im worried this keep happening again and again and one day i might loose important data if nobody fix the real cause. Need someone who know ovh server + mysql good, to find whats actually causing this and fix it permanent, not just restart and leave it. Thanks.