Intel Logic 8 can't load more than 2GB of RAM???

audiomichael · 22nd December 2007

I'm running a quad Intel, with 12GB of RAM, Logic 8. At 2.0GB of RAM (samples and instruments) loaded it's fine. Once I go to 2.01GB of "Real Memory" used, the number changes to 16,777,216.00TB of "Real Memory"...

Yes. It says almost 17 MILLION TERABYTES are RAM are being used!!!!

Then soon after, I can't load any more sounds, then soon after if I try to change sessions or open something like RMX, it crashes.

A new Mac Pro with 12GB of RAM isn't able to load much more than 3.5GB of Virtual Memory, and 2GB of "Real Memory"...this is crazy!

ANYONE have any idea of what's going on here???

clonewar · 22nd December 2007

What instruments are you loading samples into?

audiomichael · 22nd December 2007

Primarily EXS24, with a couple Kontakt3's.

I found some posts in other forums. This "16,777,216.00TB bug" has shown up quite a bit, and it's always the same number. Some people it's with Photoshop, others with Microsoft Word, others with the VSL instrument. Every instance I found though is on an Intel Mac.

Apple has a support doc about Logic 7; "Logic sometimes quits unexpectedly with big projects on computers with more than 2 GB RAM."
-WHO DOESN'T HAVE MORE THAN 2GB OF RAM!!!!!!

Then I also found a support doc about Logic 8 that says if you have more than 5GB RAM, you can load in samples to EXS, outside of Logic's 4GB RAM limit.

ButchP · 22nd December 2007

Techidit here ....

on that note.... I read that a 64 bit OS like Leopard can address up to 16 exabytes(16,000,000 gb) of ram(as opposed to 32 bits 4 gb)....it looks like you just need 15,000,988, more gb and everything will be fine...Newegg may have some on sale...

BP

audiomichael · 22nd December 2007

I spoke with Logic tech support this morning, and thus far the official stance is either,

"Hmm. That's weird." or "Uh, I don't know".

reid · 22nd December 2007

I remember reading in a couple of places that if you're using more than a couple of Gb RAM in your computer for virtual instruments, the computer is happier if you switch Virtual Memory off. Give it a go?

audiomichael · 22nd December 2007

Quote:

Originally Posted by reid

I remember reading in a couple of places that if you're using more than a couple of Gb RAM in your computer for virtual instruments, the computer is happier if you switch Virtual Memory off. Give it a go?

Thanks...I will.

Switchcraft · 22nd December 2007

Did that help?

dkatz42 · 22nd December 2007

You can't turn VM off at the o/s level, though the EXS24 has its own VM management stuff for samples.

The bug you see is a classic sign extension bug. Once you hit 2GB, the high order bit (as represented in 32 bits) is set. The bug is doing a signed extension to 64 bits, which causes that top "1" bit to be set in the top 32 bits of the 64 as well. Then when you view the resulting value, you'll see either *negative* 2GB, or a positive gazillion.

This is more likely a bug in the display code than in the inner workings (since otherwise nobody could use more than 2GB, and there seem to be folks doing that successfully) but on the other hand there are an infinite number of ways to get it wrong versus a very small number of ways to get it right.

Welcome to the 64 bit transition.

audiomichael · 22nd December 2007

Quote:

Originally Posted by dkatz42

Welcome to the 64 bit transition.

I'm sure Leopard would take care of all of these problems. I'm hoping 3rd party software get's updated more quickly than it has.

Quote:

Originally Posted by Switchcraft

Did that help?

Not really, but it's hard to tell. It wouldn't playback. Kept saying "disk too slow...prepare". I think I'm going to have to "autosampler" everything so I have an entirely EXS template. I'll keep trying.

--

If anyone's curious, here's a pic:

dkatz42 · 23rd December 2007

Quote:

Originally Posted by audiomichael

I
If anyone's curious, here's a pic:

That's just a bug in Activity Monitor. Don't worry about it.

audiomichael · 23rd December 2007

I don't think it's a bug, because once this starts happening, Logic runs out of RAM...I can't load anymore EXS or other instruments because it will either crash Logic, or I get a "Not Enough Memory" message. Also, there is so little memory left that sometimes the screen will go white because it can't draw.

dkatz42 · 26th December 2007

Well, there are definitely one or more bugs at work here.

Activity Monitor definitely has a bug.

Perhaps there are others as well.

How much free disk space do you have on the startup drive? Things should continue to work, even as you run out of RAM, but will just slow down radically due to swapping. If you run out of swap space, the machine will hang.

Or there could well be a bug in Logic that is tickled when the high order bit gets set in memory addresses (if somebody's trying to do pointer math with signed integers, for instance.)

22nd December 2007	#1
audiomichael Lives for gear Joined: Mar 2005 Location: L. A.-ish Posts: 2,165 Thread Starter	Intel Logic 8 can't load more than 2GB of RAM??? I'm running a quad Intel, with 12GB of RAM, Logic 8. At 2.0GB of RAM (samples and instruments) loaded it's fine. Once I go to 2.01GB of "Real Memory" used, the number changes to 16,777,216.00TB of "Real Memory"... Yes. It says almost 17 MILLION TERABYTES are RAM are being used!!!! Then soon after, I can't load any more sounds, then soon after if I try to change sessions or open something like RMX, it crashes. A new Mac Pro with 12GB of RAM isn't able to load much more than 3.5GB of Virtual Memory, and 2GB of "Real Memory"...this is crazy! ANYONE have any idea of what's going on here??? __________________ Michael David Nielsen - Composer / Producer / Lover ...of gear http://michaelnielsenmusic.com/

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22nd December 2007	#2
clonewar Lives for gear Joined: Feb 2005 Posts: 1,182	What instruments are you loading samples into?

22nd December 2007	#4
ButchP Lives for gear Joined: Feb 2007 Location: Long Beach Ca, Posts: 563	Techidit here .... on that note.... I read that a 64 bit OS like Leopard can address up to 16 exabytes(16,000,000 gb) of ram(as opposed to 32 bits 4 gb)....it looks like you just need 15,000,988, more gb and everything will be fine...Newegg may have some on sale... BP

22nd December 2007	#6
reid Lives for gear Joined: Sep 2005 Location: Berlin-London Posts: 1,049	I remember reading in a couple of places that if you're using more than a couple of Gb RAM in your computer for virtual instruments, the computer is happier if you switch Virtual Memory off. Give it a go?

22nd December 2007	#8
Switchcraft Lives for gear Joined: Jul 2004 Posts: 1,059	Did that help?

22nd December 2007	#9
dkatz42 Lives for gear Joined: Aug 2004 Location: Santa Fe, NM Posts: 988	You can't turn VM off at the o/s level, though the EXS24 has its own VM management stuff for samples. The bug you see is a classic sign extension bug. Once you hit 2GB, the high order bit (as represented in 32 bits) is set. The bug is doing a signed extension to 64 bits, which causes that top "1" bit to be set in the top 32 bits of the 64 as well. Then when you view the resulting value, you'll see either negative 2GB, or a positive gazillion. This is more likely a bug in the display code than in the inner workings (since otherwise nobody could use more than 2GB, and there seem to be folks doing that successfully) but on the other hand there are an infinite number of ways to get it wrong versus a very small number of ways to get it right. Welcome to the 64 bit transition.

23rd December 2007	#12
audiomichael Lives for gear Joined: Mar 2005 Location: L. A.-ish Posts: 2,165 Thread Starter	I don't think it's a bug, because once this starts happening, Logic runs out of RAM...I can't load anymore EXS or other instruments because it will either crash Logic, or I get a "Not Enough Memory" message. Also, there is so little memory left that sometimes the screen will go white because it can't draw.

26th December 2007	#13
dkatz42 Lives for gear Joined: Aug 2004 Location: Santa Fe, NM Posts: 988	Well, there are definitely one or more bugs at work here. Activity Monitor definitely has a bug. Perhaps there are others as well. How much free disk space do you have on the startup drive? Things should continue to work, even as you run out of RAM, but will just slow down radically due to swapping. If you run out of swap space, the machine will hang. Or there could well be a bug in Logic that is tickled when the high order bit gets set in memory addresses (if somebody's trying to do pointer math with signed integers, for instance.)