How to block multiple pressing f5?

Question

WordPress

I have a vps with one site wordpress
centos-7.4-x86_64
MARIADB10
percent 2x2.8GHz, memory 2GB on the VESTACP panel
-
when you press F5 repeatedly , the
server hangs, then falls to 500, then comes to life, but the server muscle does not rise
---
what to add
, right away I'll say, I'm just learning
Thank you.

Answer 1

https://hostadvice.com/how-to/how-to-tune-and-opti...
But still, check what exactly is failing.

Answer 2

those. your site is not ready to open and a small load brings it down.
Disable all plugins and switch to the default WP theme - twenty. Repeat f5
If it fails, get out of the tariff plan or hosting