RAM disk

A RAM drive (also called a RAM disk) is a block of random-access memory (primary storage or volatile memory) that a computer's software is treating as if the memory were a disk drive (secondary storage). It is sometimes referred to as a virtual RAM drive or software RAM drive to distinguish it from... Continue Reading →


BogoMips to jednostka testu wydajności procesora, wykonywanego przez jądro systemu operacyjnego Linux podczas jego startu, używany do kalibracji wewnętrznej pętli opóźniającej (ang. busy-loop). Nazwa powstała ze złączenia ang. słowa bogus ("nieprawdziwy") i skrótu MIPS (prawdopodobnie jej autorem jest Linus Torvalds).... Continue Reading →

VM stats: RSS HWM…

* VmPeak: Peak virtual memory size. * VmSize: Virtual memory size. * VmLck: Locked memory size (see mlock(3)). * VmHWM: Peak resident set size ("high water mark"). * VmRSS: Resident set size. * VmData, VmStk, VmExe: Size of data, stack,... Continue Reading →



The difference among VIRT, RES, and SHR in top output LinuxAdd comments VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the... Continue Reading →

Memory in Linux

FROM: One basic concept in the Linux implementation of virtual memory is the concept of a page. A page is a 4Kb area of memory and is the basic unit of memory with which both the kernel and the CPU... Continue Reading →

less -R


Useful ifconfig commands

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