vagrant freezes after a while - linux

Question

Using Vagrant for development, the VM freezes after a while working with it. I have to reload the box in order to be able to work with it again. The file is very simple and straightforward:
# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.configure("2") do |config|
config.vm.box = "ubuntu/xenial32"
config.vm.network "forwarded_port", guest: 80, host: 8080
config.vm.network :private_network, ip: "192.168.68.8"
config.vm.provider "virtualbox" do |v|
v.memory = 8192
v.cpus = 2
end
config.vm.synced_folder "./", "/var/www/html", owner: "www-data", group: "www-data"
config.ssh.insert_key = false
config.vm.provision :shell, path: "config/vagrant/bootstrap.sh"
end
and config/vagrant/bootstrap.sh looks like:
#!/usr/bin/env bash
# Variables
DBNAME=dbname
DBUSER=dbuser
DBPASSWD=dbpassword
apt-get -y install software-properties-common
add-apt-repository -y ppa:ondrej/php
apt-get update
apt-get update
debconf-set-selections <<< "mysql-server mysql-server/root_password password $DBPASSWD"
debconf-set-selections <<< "mysql-server mysql-server/root_password_again password $DBPASSWD"
apt-get -y install mysql-server
sed -i "s/.*bind-address.*/bind-address = 0.0.0.0/" /etc/mysql/mysql.conf.d/mysqld.cnf
mysql -uroot -p$DBPASSWD -e "CREATE DATABASE $DBNAME"
mysql -uroot -p$DBPASSWD -e "grant all privileges on $DBNAME.* to '$DBUSER'#'%' identified by '$DBPASSWD'"
mysql -uroot -p$DBPASSWD -e "flush privileges"
sudo apt-get -y install apache2 php7.4 php7.4-mysql php7.4-mbstring php7.4-dom php7.4-sqlite php7.4-zip php7.4-curl php7.4-intl
sudo apt-get -y install curl composer zip unzip
sudo phpenmod pdo_mysql
sudo service apache2 restart
sudo service mysql restart
I read a blog post that suggests removing config.ssh.insert_key = false as a solution but this does not work.
Any ideas?
EDIT
there is no output. It works as expected for approximately 15 minutes before the entire box freezes and stops responding (no response to shell input as well as no vagrant ssh).

Answer 1

Ok, I think I found the issue.
I have changed this line:
v.cpus = 2
to
v.cpus = 1
and I had no hang ups the whole day.