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Top Forums UNIX for Beginners Questions & Answers Interpreting Linux's free command output Post 303010988 by bakunin on Thursday 11th of January 2018 12:04:44 PM
Old 01-11-2018
Quote:
Originally Posted by drysdalk
I would imagine that under normal circumstances the kernel would choose to allocate memory from the free pool first, before flushing out buffers, cache or anything else.
In principle: yes. You can change this behavior to some extent by setting kernel tuning parameters but for most purposes the default behavior does quite OK so that this is not necessary. Here, for instance, is a document describing some of the tuning possibilities:

http://docs.gluster.org/en/latest/Administrator%20Guide/Linux%20Kernel%20Tuning/


for a very short introduction what performance tuning is about you might also read this introduction i once wrote.

Before you try that or anything else in this regard: notice that the result can be really catastrophic! Experiment a lot (on a test system, of course), but treat it like open-heart surgery: this can do a dramatic lot of good if you know what you do but it can prove catastrophic results when you don't. Don't be shy, but be careful.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
 

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JIGDO-LITE(1)															     JIGDO-LITE(1)

NAME
jigdo-lite - Download jigdo files using wget SYNOPSIS
jigdo-lite [ URL ] DESCRIPTION
See jigdo-file(1) for an introduction to Jigsaw Download. Given the URL of a `.jigdo' file, jigdo-lite downloads the large file (e.g. a CD image) that has been made available through that URL. wget(1) is used to download the necessary pieces of administrative data (contained in the `.jigdo' file and a corresponding `.template' file) as well as the many pieces that the large file is made from. The jigdo-file(1) utility is used to reconstruct the large file from the pieces. `.jigdo' files that contain references to Debian mirrors are treated specially: When such a file is recognized, you are asked to select one mirror out of a list of all Debian mirrors. If URL is not given on the command line, the script prompts for a location to download the `.jigdo' file from. The following command line options are recognized: -h --help Output short summary of command syntax. -v --version Output version number. --scan FILES Do not ask for "Files to scan", use this path. --noask Do not ask any questions, instead behave as if the user had pressed Return at all prompts. This can be useful when running jigdo- lite from cron jobs or in other non-interactive environments. SEE ALSO
jigdo-file(1), jigdo-mirror(1), wget(1) (or `info wget') CD images for Debian Linux can be downloaded with jigdo <URL:http://www.debian.org/CD/jigdo-cd/>. AUTHOR
Jigsaw Download <URL:http://atterer.net/jigdo/> was written by Richard Atterer <jigdo atterer.net>, to make downloading of CD ROM images for the Debian Linux distribution more convenient. 19 May 2006 JIGDO-LITE(1)
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