MemTotal

MemTotal is a parameter found in the /proc/meminfo file on Unix-like operating systems, including Linux. It represents the total amount of physical memory (RAM) available on the system. This value is expressed in kilobytes (KB) and is a key metric for understanding the system's memory capacity. It is used by various system utilities and tools to monitor and manage memory usage.

The MemTotal value is determined at system boot time and remains constant throughout the system's runtime. It includes all the physical memory installed on the system, regardless of whether it is currently in use or available for allocation. This parameter is crucial for system administrators and developers who need to assess the system's memory resources and optimize performance.

In addition to MemTotal, the /proc/meminfo file contains other relevant parameters such as MemFree, Buffers, Cached, SwapTotal, and SwapFree. These parameters provide a comprehensive view of the system's memory usage and help in diagnosing memory-related issues.

Monitoring MemTotal and other memory-related parameters is essential for maintaining system stability and performance. Tools like free, top, and htop can be used to display these values and track memory usage over time. Understanding and interpreting these parameters are fundamental skills for anyone managing a Unix-like system.