Questions about: cache

Prior warning: bcache can not be used for your existing Ubuntu installation. If you need SSD caching for your operating system you should wait for a future or special version of the Ubuntu installer which could set up your SSD cache. See this answer
Ubuntu wants to enable TRIM for SSDs by default in Ubuntu 14. 04. In other words, Ubuntu isn’t already using TRIM, so your SSD is slowing down over time
A "cookie" refers to a small string of text code placed on a user's hard drive by a website or web browser. Cookies are also called "tracking cookies," "browser cookies," "computer cookies," "Internet cookies," "HTTP cookies" and "web cookies. " Cont