Magento Application modes have different configurations of the Magento platform which affect the store’s performance and operations.
You can set Magento modes in any of the following :
There is also another mode known as “Maintenance Mode” but it operates very differently, intended to prevent access to a Magento site while it is being updated.
It enables you to deploy the Magento site on a single server without changing any settings. However, the default mode is not optimized to run a live site. To deploy the Magento application on more than one server or to optimize it for a live site, change to one of the other modes preferably “Production Mode”. The Default mode is usually used when we launch the Magento 2 site for the first time.
Default mode has the following key features:
1) Static view file caching is enabled.
2) Errors are not displayed to the end user, instead, they are written to log files. They are logged to the var/reports directory at the server.
3) Symlinks to the static view files are published to the pub/static.
4) Hides custom X-Magento-* HTTP request and response headers
The Developer mode is intended only for development. This is the mode you should use to customise Magento 2 functionality. This mode slows down the front end and the website admin.
Developer mode has the following key features:
1) We can utilise caching while in Developer mode, it is typically disabled to speed up development testing.
2) Provides verbose logging
3) Enables automatic code compilation
4) Enables enhanced debugging, Shows errors on the frontend.
5) Shows custom X-Magento-* HTTP request and response headers
6) Static view files are written to the Magento pub/static directory every time they’re called.
We must run Magento in production mode when it is deployed to a production server to get better performance. After optimizing the server environment, you should run the static view files deployment tool to write static view files to the Magento pub/static directory. This improves performance by providing all necessary static files at deployment instead of forcing Magento to dynamically locate and copy static files on demand during run time.
Production mode has the following key features:
1) Static view files are not materialized, and URLs for them are composed on the fly. Static view files are served from the cache only.
2) Errors are logged to the file system and are never displayed to the user.
Note: You cannot enable or disable cache types using the Admin. You can enable and disable cache types only using the command line.
You need to enable maintenance mode to take your site offline while you complete maintenance, upgrade, or configuration tasks. In maintenance mode, the site redirects visitors to a default Service Temporarily Unavailable page.
You can create a custom maintenance page, manually enable and disable maintenance mode, and configure maintenance mode to allow visitors from authorized IP addresses to view the store normally. See enable and disable maintenance mode.
How to Check the Current Magento 2 Mode:
To change or set the Magento mode, you have to use a set of CLI commands. To know more about it read the blog below: