Visit Jeremy's Blog.
Go Back > Forums > Linux Forums > Linux - Distributions > Slackware
User Name
Slackware This Forum is for the discussion of Slackware Linux.


  Search this Thread
Old 09-18-2013, 04:33 PM   #1
Registered: Jan 2012
Location: Directly above the center of the earth
Distribution: Slackware. There's something else?
Posts: 383

Rep: Reputation: 71
k3b uses up 2GB of RAM burning bd-r's...

(I posted this over in the forum also, but it doesn't seem as active over there as here)

I've got k3b setup to use as much RAM as possible when burning. It only allows me to set it at 2GB, and that's it.

Unfortunately it seems to use that up pretty quickly when burning a 25GB BD-R. For example, when it gets (usually) to about 10% done of 100%, the 'software' buffer will begin to go from 100% down to 0% in just a few minutes and the burning will slow down from ~40MB/s to ~12MB/s because it's stuck with only the hardware buffer.

Once in a while at around 60% finished, the software buffer will start to rise again to 100% but within only a few seconds of it reaching 100% it will start to go down again until it's using the hardware buffer again.

Does anyone have any idea(s) what I can do to have k3b use and *keep* the software buffer up during the whole burning process? As it is, 23GB onto a BD-R takes on average ~25 minutes. If it could keep the software buffer up during the whole burn process, it could probably cut that time almost in half. I have 4GB of RAM available, so it's a shame it has to fall so quickly and get stuck using 4MB of hardware buffer.

Slackware 14.0, AMD FX-6300 3.5GHz cpu, ASUS M5A97 LE R2.0 mobo, Crucial Ballistix 4GB DDR3 PC3-14900 RAM, LG WH14NS40 14X Blu-Ray Burner
Old 09-18-2013, 08:36 PM   #2
LQ Guru
Registered: Feb 2003
Location: Blue Ridge Mountain
Distribution: Linux Mint 17, Debian 8
Posts: 7,863

Rep: Reputation: 311Reputation: 311Reputation: 311Reputation: 311
"If it could keep the software buffer up during the whole burn process, it could probably cut that time almost in half."

Actually the limiting factor is the speed of the burner. As long as you have enough software buffer to keep ahead of the hardware buffer (and you do) then the size of the software buffer is irrelevant to the speed of the burn.

Steve Stites
Old 09-18-2013, 08:39 PM   #3
Registered: Dec 2009
Location: Germany
Distribution: Whatever fits the task best
Posts: 17,134
Blog Entries: 2

Rep: Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839Reputation: 4839
If the software buffer is underrun while burning this is a sign that your storage subsystem is not able to deliver the data to the software buffer with the necessary speed. So either reduce burning speed or use a faster storage subsystem.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Finding out what RAM chip needed to upgrade from 2GB to 4GB RAM. farmerluk Linux - Hardware 4 11-17-2011 12:02 PM
Only 2GB our of 4GB RAM detected tamoneya Linux - Hardware 6 01-19-2008 10:15 PM
Will k3b convert mp3's to wavs for burning audio cds? And prob with k3b 0.11 Alvis Linux - Software 5 08-02-2007 07:38 AM
What if you had 2GB RAM and 4GB HD? AC97Conquerer General 21 03-28-2005 07:21 PM
process to use more than 2GB RAM simplyrahul Linux - General 12 10-27-2004 08:17 PM > Forums > Linux Forums > Linux - Distributions > Slackware

All times are GMT -5. The time now is 09:40 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration