High memory usage with 2GB ram on VPS

I have switched to VPS hosting with 2GB RAM on Vultr 3 days ago.

I have extremely high memory usage even when all plugins are disabled. I’m restarting the VPS server every hour.

I use just 6 plugins: Aksimet, Q2W3 Fixed Widget, ST Kit, WP-page-Navi, WP Missed Schedule and WP Super Cache.

Also, the theme that I use is paid and very light.

Not to mention that I have almost no visitors. 50-60 page views for all day.