Dvd2oneX problem - Club CDFreaks

jonzg · 14-08-2003

Hello:

I am have a problem when I finish using Dvd2oneX. After the program compresses the movie, the computer get's very slow. It slows down when I do the following things: Open a hard drive, access any menu, even if I just pass the cursor over the dock, the computer reacts slowly. After a couple of minutes everything get back to normal.

Is this normal?????

I am using a ti powerbook 1ghz g4 with 1Gb ram.

Thanks.

Jonzg

bendermac · 17-08-2003

you're not alone

while dvd2onex seams not to take much cpu it takes alot of the hd and drags the system down but it's kinda stupid to leave your mac untouched until the process is done. maybe rené or erwin can look at this problem

davidcc · 17-08-2003

jonzg,

I too experienced similar slow down of the system after using DVD2onex. I qucikly fixed this by logging out ond then back in.

David

DoL · 17-08-2003

The problem is not with dvd2oneX. It is with MacOS X and it's disk caching algorithm.

When you access large disk sections as you do when writing a 4GB DVD most operating systems use unused memory to cache that disk section in memory to increase performance.

Unfortunately Mac OS X seems to have an algorithm for this that is too aggressive against running applications. That means that it will page out to disk your running, but not active, applications to gather more free memory. This means that when you try to do something with these applications that they need to be paged back in from disk. This paging is extremely inefficient and cause horrible lagging and the performance impact you have seen.

Unfortunately I have not found a solution to this problem.

There are a couple of work around to this. One is logging out and in forces all your applications to be terminated and the new applications started won't be paged out.

Not a lot of help I know but hopefully you now understand what id happening.

WiseWeasel · 18-08-2003

I notice the same problem as the original poster on my G4/466 with 640 MB RAM, though the problem seems to go away once I quit DVD2OneX (no problem since it's done anyways) and start using my other apps. For about 10-15 seconds, however, the computer is quite unresponsive. This isn't a big problem, and logging out and back in is definitely unnecessary. Hopefully, my shiny new dual 2 GHz G5 w/ 1 GB of RAM will take care of all that.

DoL · 18-08-2003

You will most likely have the same problem with your new system. I have Dual G4 with 2Gb ram and the disk cache takes it all

Donks · 20-08-2003

I don't experience that on a QuickSilver 867/640MB RAM. it sounds like your cache it getting flushed, although you have more installed RAM than I.

Try running CPU Monitor (in your Utilities) and Memory Monitor in your Dock to see what's happening to your CPU and memory.

I also find that renicing DVD2OneX lets my machine remain totally responsive to me while ripping.

14-08-2003	#1 (permalink)
jonzg New on Forum Join Date: Aug 2003 Posts: 1	Dvd2oneX problem <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> Hello: I am have a problem when I finish using Dvd2oneX. After the program compresses the movie, the computer get's very slow. It slows down when I do the following things: Open a hard drive, access any menu, even if I just pass the cursor over the dock, the computer reacts slowly. After a couple of minutes everything get back to normal. Is this normal????? I am using a ti powerbook 1ghz g4 with 1Gb ram. Thanks. Jonzg

17-08-2003	#2 (permalink)
bendermac New on Forum Join Date: Apr 2003 Posts: 7	you're not alone while dvd2onex seams not to take much cpu it takes alot of the hd and drags the system down but it's kinda stupid to leave your mac untouched until the process is done. maybe rené or erwin can look at this problem __________________ Who needs a PC when I can get a Mac

18-08-2003	#5 (permalink)
WiseWeasel CD Freaks Rookie Join Date: Mar 2003 Location: Bay Area, CA, USA Posts: 39	I notice the same problem as the original poster on my G4/466 with 640 MB RAM, though the problem seems to go away once I quit DVD2OneX (no problem since it's done anyways) and start using my other apps. For about 10-15 seconds, however, the computer is quite unresponsive. This isn't a big problem, and logging out and back in is definitely unnecessary. Hopefully, my shiny new dual 2 GHz G5 w/ 1 GB of RAM will take care of all that. __________________ I like systems, their application excepted. (George Sand, translated from French), "J'aime les systèmes, leur application exceptée."

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17-08-2003	#3 (permalink)
davidcc New on Forum Join Date: Aug 2003 Posts: 1	jonzg, I too experienced similar slow down of the system after using DVD2onex. I qucikly fixed this by logging out ond then back in. David

17-08-2003	#4 (permalink)
DoL New on Forum Join Date: Apr 2003 Posts: 5	The problem is not with dvd2oneX. It is with MacOS X and it's disk caching algorithm. When you access large disk sections as you do when writing a 4GB DVD most operating systems use unused memory to cache that disk section in memory to increase performance. Unfortunately Mac OS X seems to have an algorithm for this that is too aggressive against running applications. That means that it will page out to disk your running, but not active, applications to gather more free memory. This means that when you try to do something with these applications that they need to be paged back in from disk. This paging is extremely inefficient and cause horrible lagging and the performance impact you have seen. Unfortunately I have not found a solution to this problem. There are a couple of work around to this. One is logging out and in forces all your applications to be terminated and the new applications started won't be paged out. Not a lot of help I know but hopefully you now understand what id happening.

18-08-2003	#6 (permalink)
DoL New on Forum Join Date: Apr 2003 Posts: 5	You will most likely have the same problem with your new system. I have Dual G4 with 2Gb ram and the disk cache takes it all

20-08-2003	#7 (permalink)
Donks New on Forum Join Date: Aug 2003 Posts: 1	I don't experience that on a QuickSilver 867/640MB RAM. it sounds like your cache it getting flushed, although you have more installed RAM than I. Try running CPU Monitor (in your Utilities) and Memory Monitor in your Dock to see what's happening to your CPU and memory. I also find that renicing DVD2OneX lets my machine remain totally responsive to me while ripping.