RAM, or random access memory, is the primary form of volatile memory that a computer uses for fast read and write operations. It stores the active data and instructions that the CPU needs to operate efficiently. RAM is significantly faster than disk storage but loses data when power is removed. Increasing RAM allows more programs or larger datasets to run simultaneously. RAM capacity and speed strongly influence system responsiveness, especially during heavy workloads. Every running process occupies a portion of RAM.
How it Works
RAM uses memory cells that can be accessed in constant time regardless of their physical location. The operating system manages RAM by assigning segments to running applications and reclaiming them when programs exit. When RAM is exhausted, systems may resort to slower disk based paging, causing noticeable lag. RAM exists in modules with specific speeds and form factors. Monitoring RAM usage helps diagnose performance issues in backend services, databases, and local development environments.