Roxyon's hosting plans cover shared web hosting, WordPress hosting, and cloud VPS/dedicated servers, with storage, email, and database limits scoped per plan and add-ons available if you outgrow them.
Yes, if the subdomain is created as a separate domain in web hosting, email addresses can also be configured for it.
You can flexibly use all of the storage space in your web hosting plan for your emails, website, and databases.
If you exceed your storage space, you will be notified. If your storage space requirements have increased significantly, you can either switch to a larger web hosting package or purchase a storage space add-on (for $1.00 per 10GB).
PHP is the programming language used by many websites (e.g., WordPress). Normally, every visitor who accesses a page requires a short-term "PHP process" to generate dynamic content. The more simultaneous visitors, the more PHP processes you need.
The memory_limit in PHP determines the maximum amount of memory that a single script can use. For example, if the value is set to 192 MB, each script can use up to 192 MB of RAM during its execution.
Varnish Cache is a web application accelerator, also known as a caching HTTP reverse proxy. It typically speeds up delivery with a factor of 300-1000x, depending on your architecture. You can use it starting with the Starter S package.