Dynamic RAM Preview Max setting

NickHope wrote on 9/1/2004, 2:58 AM
Got P4 3.0GHz/1Gb RAM on my desktop and P4 2.0Ghz/512Mb RAM on my laptop.

I'm thinking of setting Dynamic RAM Preview to 64Mb or higher, rather than the default 16Mb so I can get longer RAM previews, but am I right to think that all the time Vegas is running, 64Mb would be taken away from Vegas and other applications, even if I haven't actually done a RAM preview? If that's the case I'll probably keep it at 16Mb and crank it up only when I need it. What do you do?

Comments

doctorfish wrote on 9/12/2004, 1:16 AM
I am just getting into video editing and was just coming here to post this same question.

I'm searching through the manual but have not yet found an answer to this question.

Also for dynamic RAM preview, is there any compression involved or is it just straight as it is?
I'm thinking no compression but just want to be sure about what Vegas is actually
doing.

Thanks

Dave
chaboud wrote on 9/12/2004, 6:14 AM
The memory will only be taken as more frames are cached off. This memory is allocated in the same way that Vegas allocates all other memory, so it is subject to memory management features of Windows. As long as the applications/operating system that you have running do not require more memory than you leave available, you should see no problems. Even if this value is set too high and your system begins to run low on physical memory, it should begin paging to disk.

If you really want to tune this, you can open Task Manager and look at the free physical memory while running Vegas. Setting the cache value to more than 75% of what you have free would probably not be advisable, but anything else should work.

To give you some round figures under XP, I set this value to 512 MB on machines with 1GB of RAM and 192 MB on machines with 512MB of RAM. These numbers are conservative, but I generally have several other applications running while using Vegas.

On Friday I set this to 1600 MB (on a machine with 4GB of memory) to RAM-preview a 40-second full-size composite without any issues.