77west

I managed to OOM v4!

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During testing setting the TEXTURE_SIZE_EXP=10 flag, with a PMDG 747 over ORBX New Zealand, I got OOM on loadout.

Now this is not a VAS OOM, but literally, it hit a RAM limit. Not sure if VRAM or system RAM, I have 16GB system RAM and 8GB VRAM, I saw P3D using just under 12GB system RAM, and 7.4GB VRAM, just before P3D gave me the OOM message.

Now I was just testing to see how far I could push it, but would appreciate from LM if I upped my system RAM to 32GB, if P3D would actually scale well and use additional RAM or not.

Removing the TEXTURE_SIZE_EXP=10 flag, I see about 6GB system RAM and 4GB VRAM used, in the same situation.

Interesting. 

(Before anyone goes off at me, I am testing, not criticising or in any way suggesting or implying anything about P3Dv4 other than it is awesome!)

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Well done Wes! BTW I already have 32GB of RAM so I should be fine.:mellow:

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Why would it hit a RAM limit, when it could use a pagefile? Did you try increasing your page file size?

Could you also post the exact message?

YOU did not hit the OOM/VAS limit. I can assure you that. 

 

I do not know how the VRAM works and its limitations... so I cannot comment on that... 

I am also glad you are pushing it to the limit to see its perimeter! :)

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6 minutes ago, Manny said:

Why would it hit a RAM limit, when it could use a pagefile? Did you try increasing your page file size?

I was gonna ask the same.

Dirk.

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I forgot about pagefile duh...! I usually run no pagefile as in the past nothing used all my RAM. Will try with pagefile and see. 

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7 minutes ago, 77west said:

I forgot about pagefile duh...! I usually run no pagefile as in the past nothing used all my RAM. Will try with pagefile and see. 

That's the answer to why you hit the RAM limit.

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Once it's using the pagefile you'll be getting about 2 fps

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1 minute ago, Slayer said:

Once it's using the pagefile you'll be getting about 2 fps

The consensus is already that 32GB RAM is the way to go at very high settings in P3Dv4

Dirk.

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Just now, Dirk98 said:

The consensus is already that 32GB RAM is the way to go at very high settings in P3Dv4

Dirk.

Already there , XP11 pushed me there last winter :P

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11 minutes ago, Slayer said:

Once it's using the pagefile you'll be getting about 2 fps

I dont plan on that for normal simming. I kinda did this to see if upgrading to 32gb is worth it given i am looking at getting a new rig with the new i9 cpu family etc. Might wait till then so i dont waste cash on more ddr3 ram

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32GB is worth it. It's usually a nightmare to find matching RAM a few years later short of replacing all sticks. In XP 11 with HD mesh I OOM'd my PC a few times. I suspect with P3D once we start loading addons with no restriction or VAS budget to worry about 16GB will quickly become too little on this platform as well.

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after reading all of this 64GB RAM sounds like a plan for my upcoming build ...... 

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39 minutes ago, Dirk98 said:

The consensus is already that 32GB RAM is the way to go at very high settings in P3Dv4

Dirk.

The consensus a few months ago was that 16gigs would be more than enough for any sim. based on experience of how things like that usually turn out, I immediately purchased 32gigs for my new computer! :ha:

If people start saying 32gigs is the sweet spot, I'll have to start pricing how to get to 64gigs........

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I never bothered with more in the past because obviously p3d cant use it, i may temporarily borrow some to get 32gb then put 64gb in new build in a few months. Being in IT has its perks lol

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Next CPU I get, is gonna be 8 cores. :)

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Looking at the replies I have to smile. 32GB of RAM looking at 64GB. 20 years ago it was 32MB of SD RAM. How far we've come.

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Gulp! I've only got 16GB of RAM in my laptop...
Oh, well - I don't turn the settings up that high, anyway - so I guess I'm good... 

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7 hours ago, 77west said:

During testing setting the TEXTURE_SIZE_EXP=10 flag, with a PMDG 747 over ORBX New Zealand, I got OOM on loadout.

Now this is not a VAS OOM, but literally, it hit a RAM limit. Not sure if VRAM or system RAM, I have 16GB system RAM and 8GB VRAM,

With those add-ons and the TEXTURE_SIZE_EXP=10 you'll need more than 8GB VRAM.  But 16GB system RAM is "enough" so far.  But if you want to keep using TEXTURE_SIZE_EXP=10 you'll need to get a 1080Ti or Titan X Pascal ... I've managed to use 10.8GB VRAM in some of my extreme tests when using TEXTURE_SIZE_EXP=10 and increase shadow res/distance to 8192.

Your OOM issue is VRAM, not system RAM.

Cheers Rob.

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4 minutes ago, Rob Ainscough said:

With those add-ons and the TEXTURE_SIZE_EXP=10 you'll need more than 8GB VRAM.  But 16GB system RAM is "enough" so far.  But if you want to keep using TEXTURE_SIZE_EXP=10 you'll need to get a 1080Ti or Titan X Pascal ... I've managed to use 10.8GB VRAM in some of my extreme tests when using TEXTURE_SIZE_EXP=10 and increase shadow res/distance to 8192.

Your OOM issue is VRAM, not system RAM.

Cheers Rob.

I figured that was more likely - but P3D gave the proper error dialogue box "your computer has run out of available memory" which is why I thought it might be normal RAM / no pagefile. I would think running out of VRAM the sim would just crash?

I don't plan on running EXP=10 long term. But it is cool to see what possible, imagine what we will be able to do in 3-5 years time!

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I guess that is not problem as when you run out of VRAM, it will use RAM instead, sure it can introduce some performance loss as data have to be transfered more often via PCI-E buss. Windows 10 are better results than previons versions as management of that shared memory is better.

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This thread, plus the fact XP just took me to 26gb out of 32 the other day I had to pop for another 32GB of ram....

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12 hours ago, 77west said:

I figured that was more likely - but P3D gave the proper error dialogue box "your computer has run out of available memory" which is why I thought it might be normal RAM / no pagefile.

Yes, when VRAM is used up you'll be consuming system RAM which is considerably slower and performance will drop, once system RAM is consumed you move to pagefile and start swapping to disk.  Without a pagefile (I highly recommend you let the OS manage your pagefile regardless of how much RAM you have installed, no pagefile can cause problems and not having one is more urban legend of decades gone by) you'll get the OOM.

I use TEXTURE_SIZE_EXP=10 all the time as it doesn't seem to have any FPS impact (at least on my GPU) so long as one has enough VRAM to support it's appetite.  But if you want a good idea of just how good TEXTURE_SIZE_EXP=10, load up Orbx (or UTX or scenery product of choice) with FB KDEN and take a look at the distant mountains from KDEN, not a single blurry mountain and looks accurate to the view distances.

But like I said, I'd only recommend using TEXTURE_SIZE_EXP=10 with a 1080Ti or Titan X Pascal that has necessary VRAM to support.

Cheers, Rob.

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Ive been flying all day in and out of NYC with the TFDI and NYCX as well as Imaginesim KLGA, Flytampa Boston, Imagine KATL, LatinVFR KMIA and NY Airports KEWR. NO OOM! :cool:

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As I've stated elsewhere:

...for the first time ever (mark this day in history) I was able to fly from FSDT KCLT to FB KDEN to FSDT KLAS to FSDT KLAX, serviced by GSX at every stop, in the PMDG 747-V3 with Orbx FTX Global, OpenLC, Vector, Orbx SoCal, and AS16/ASCA (networked), (SODE 1.5.1), FSUIPC5, FS Commander (networked), very high graphics settings (30 FPS locked), all in a SINGLE P3D V4 session (flying from day thru to night).

 I'm not much of a drinker, but I cracked open a bottle of Champagne for that as it's been 11 years in the waiting.

Cheers, Rob.

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