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RAM Usage by Sony Vegas
Hey,
Just a question about Ram Usage. Have an i7 4960x 4.7ghz and 64gb ram 64bit win 8.1.
Checking taskmanager during a render, I noticed that the CPU is never used even close to 100%, max is about 80 and then very very briefly, averages 40-50% usage. Vegas also only uses 8-9GB ram. Compared to After Effects which when I set to full usage of say 60GB Ram, it actually uses all of that, is a little disappointing. I feel almost like I am missing something here that is constraining vegas. All media being rendered is on samsung 840 SSDs (read/write 500Mb/s)so im not entirely sure what is limiting.Wish vegas had more options like AE does to fine tune stuff like ram and thread usage. Have got Vegas set to 16 threads and the Ram Preview at 4GB (I realise this limits Vegas if you have small amounts of Ram, but obviously have 60GB left here it could use).
Is something up?
replied 12 years, 6 months ago 3 Members · 3 Replies
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3 Replies
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Nothing is up. Vegas is just not optimized, nor optimized as After
Effects, to make full use of total Rams available during rendering.Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
https://www.facebook.com/FilmexCreativeMedia
1-876-461-9019 -
Vegas doesn’t have any use for all that RAM. That’s pretty much it. Adobe stuff is pretty well known for being memory pigs… not that this is much of a problem on a 64GB PC. Mine too… but that’s for photography. I haven’t found any use for that much RAM in video, but I’m also not an After Effects user.
As far as CPU use, Vegas should be able to nail your CPU to over 90% use, as long as the CPU is the bottleneck in the system. If you’re using the GPU as well, that’s one thing that’ll very definitely lower your CPU peaks, simply because there’s a communications delay between CPU and GPU, and unless Vegas fully pipelined that (eg, the CPU is never actually waiting on the GPU to finish, but moving on to the next thing), the CPU’s going to sit idle some of the time waiting for the GPU.
RAM can also potentially be a bottleneck, particularly as your number of CPU cores starts to grow faster than your memory bandwidth. It’s also technically possible that things slow down when you have Hyperthreading enabled on an i7 system. But that’s very job dependent.
And of course, your storage can be the bottleneck pretty easily. In the ideal case of an SSD, much less, but for HDDs, even fast ones, when you’re reading and writing multiple streams in a render, the drive’s seek time can be a problem. And you’ll see this more on a very fast machine; does the CPU work finish before the HDD work or not? This is fixed by spreading assets around. It’s not the problem in a simple project.
-Dave
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A along and detailed summary as usual Dave, lol … Good!
Steve Rhoden
(Cow Leader)
Film Editor & Compositor.
Filmex Creative Media.
https://www.facebook.com/FilmexCreativeMedia
1-876-461-9019
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