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#1 2005-10-19 08:44:14

fdrebin
Member
Registered: 2005-04-25
Posts: 152

k3b slows down after 28%

i got a fast dvd/cd burner and when starting to burn a cd it writes with about 35x but after 28% the device buffer goes down to 1% and it only writes with 1-2x!
(that i'm burning a 900mb cd shouldn't matter here)
in windows i burn the same cd with full speed all the time...

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#2 2005-10-19 10:00:35

T-Dawg
Forum Fellow
From: Wilmington, NC
Registered: 2005-01-29
Posts: 2,734

Re: k3b slows down after 28%

maybe your tmpfs ran out of space, its happened to people before ripping mp3's. Try commenting out that line in fstab, reboot and try again.

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#3 2005-10-19 10:15:20

mpie
Member
From: 404 Not found
Registered: 2005-03-06
Posts: 649

Re: k3b slows down after 28%

or change the work path in k3b-setup

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#4 2005-10-19 10:34:11

T-Dawg
Forum Fellow
From: Wilmington, NC
Registered: 2005-01-29
Posts: 2,734

Re: k3b slows down after 28%

mpie wrote:

or change the work path in k3b-setup

Better, didn't know you could do that wink

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#5 2005-10-19 10:43:21

mpie
Member
From: 404 Not found
Registered: 2005-03-06
Posts: 649

Re: k3b slows down after 28%

Yeah I use a temp in my home directory...


otherwise dvd's never work

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#6 2005-10-19 10:55:51

fdrebin
Member
Registered: 2005-04-25
Posts: 152

Re: k3b slows down after 28%

hope it works now next time....
btw why does arch create just such a small temp dir ?

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#7 2005-10-19 11:05:58

lucke
Member
From: Poland
Registered: 2004-11-30
Posts: 4,018

Re: k3b slows down after 28%

Well, by default Arch uses tmpfs as /tmp filesystem, meaning that temporary files are put into your RAM, not on your hdd (to put it simply). It's a (more or less) good thing if you keep only small files in /tmp (faster access, it cleans itself utterly every reboot), but alas, causes problems when one needs more space in /tmp (tmpfs space is obviously pretty much limited, depending on your amount of RAM).

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#8 2005-10-19 11:12:58

T-Dawg
Forum Fellow
From: Wilmington, NC
Registered: 2005-01-29
Posts: 2,734

Re: k3b slows down after 28%

This is also where swap space comes into play. Once the kernel says to the application: "nope, thats enough ram space for you" it'll redirect the rest into swap. That's why you wan't to pay attention to the amount of swap you have when using tmpfs, although speed is reduced considerably once it has started to be used.
When you comment the line in fstab, /tmp is now not part of the tmpfs system, but a regular directory under your root partition. Therefore limited only to remaining harddrive space yet slower in performance than tmpfs.

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#9 2005-10-20 08:43:43

cs25x
Member
Registered: 2004-05-04
Posts: 150

Re: k3b slows down after 28%

Maybe you can get away without a reboot, just umount /temp. If nothing is using /tmp then it will drop back to your HD. I zapped tmpfs long ago, if it is going to use a HD for swap, then we might as well use the HD for /tmp. Even unzipping a big file with mc clobbers ram.


--(*(cs25x--));

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#10 2005-10-20 10:41:26

LB06
Member
From: The Netherlands
Registered: 2003-10-29
Posts: 435

Re: k3b slows down after 28%

Maybe there's some copy prevention meganism in place?

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#11 2005-10-20 10:48:50

T-Dawg
Forum Fellow
From: Wilmington, NC
Registered: 2005-01-29
Posts: 2,734

Re: k3b slows down after 28%

LB06 wrote:

Maybe there's some copy prevention meganism in place?

Yeah, it's called running out of tmpfs space. Read the posts above.

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