Many developers specially web developers know how much caching can speed up responses from a web server. So inevitably they implement one of the many caching techniques available from reverse proxy caching to application based page caching and database object caching. These are all mostly based on storing a key-value pair through an external application. Memcached is a popular key value storage engine which stores data in memory.
Mysql is one of the most popular open source relational database management systems out there and they have been adding new mature features to it's databases on a regular basis. Mysql earlier was known to be a fast database mostly suitable for web applications based on LAMP stack.
Drupal installation usually does not take into account Mysql utf8mb4 capabilities to provide true unicode character storage in Mysql databases. This is due to the reason that Mysql by default does not allow large indexes and dynamic row format required by Drupal to install database objects in utf8mb4 character encoding. So we will see how to install Drupal in utf8mb4 encoding directly instead of converting the database to utf8mb4 format post installation.
Drupal is a very popular content management system (CMS) or rather as they like to call it a content management framework (CMF). Drupal runs a very large number of websites around the world from high traffic websites to personal ones. This popularity of Drupal means that it should support as many languages and characters as possible to truly serve it's user base. Mysql among others is a popular database which powers Drupal's backend.
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