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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

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 →

5-linux-command-line-tricks

http://www.tecmint.com/5-linux-command-line-tricks/?utm_content=buffer1c75e&utm_medium=social&utm_source=facebook.com&utm_campaign=buffer

VIRT, RES, and SHR

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:http://www.linux-tutorial.info/modules.php?name=MContent&obj=page&pageid=89 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

SAR

http://www.cmdln.org/2008/04/13/analyzing-linux-system-performance-and-finding-bottle-necks/

Useful ifconfig commands

http://www.tecmint.com/ifconfig-command-examples/

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