Checking the Memory Usage. … Linux always tries to use RAM to speed up disk operations by using available memory for buffers (file system metadata) and cache (pages with actual contents of files or block devices). This helps the system to run faster because disk information is already in memory which saves I/O operations …

Why is buffer cache memory needed?

Buffer is used to compensate for difference in speed between two processes that exchange or use data. Cache is a smaller and fastest memory component in the computer. … It is mostly used for input/output processes. It is used during reading and writing processes from the disk.

What is buffer or cache memory in Linux?

Buffer is an area of memory used to temporarily store data while it’s being moved from one place to another. Cache is a temporary storage area used to store frequently accessed data for rapid access.