Extreme RAM usage

[Gunfreak]

I can not complete my mission as I hit exit the game crashes for lack of memory.

Even if I try to save half way through the mission the game crashes as I try and save.

I have 64gig DDR5, and so it shouldn't actually be a problem.

No other map causes this problem

dcs.log-20250503-103041.zip

[T.Power]

I've not had any crashes but I've never seen my 64gb RAM running at 85% on any other map on a very simple mission.

[western_JPN]

Hi.
Your log shows that Windows' Pagefile is only 9064 MB.
When main RAM is 64GB, Pagefile may need at least 32768 MB (or 65536 MB when possible) for DCS.

 

[Vakarian]

5 minutes ago, western_JPN said:

When main RAM is 64GB, Pagefile may need at least 32768 MB (or 65536 MB when possible) for DCS.

If you have physical 64GB RAM and you require page file, something is very wrong. Is the whole map trying to get loaded in RAM?

Having large page file is not a requirement, the page file is the offload for when there is not enough RAM. That helps when you have 8-16GB RAM, sometimes even with 32GB if what you're doing is very resource intensive, but there is no requirement to have a page file size = x2 of your physical RAM, that just doesn't make any sense.

[Raven (Elysian Angel)]

Reducing pre-load radius to 10km (plenty for helicopter operations) has helped me with excessive memory usage.

[Mud]

2 hours ago, western_JPN said:

Hi.
Your log shows that Windows' Pagefile is only 9064 MB.
When main RAM is 64GB, Pagefile may need at least 32768 MB (or 65536 MB when possible) for DCS.

 

There is absolutely no need to have such a large pagefile. These suggested sizes are a misconception related to the need to have your RAM amount as pagefile to be able to hybernate your system. I doubt that is still required these days, even when you do use hybernate.

In many cases you can even turn it off completely if you have that much RAM.
However, it's best to have at least some pagefile as some applications might rely on it being present.

[T.Power]

3 hours ago, Raven (Elysian Angel) said:

Reducing pre-load radius to 10km (plenty for helicopter operations) has helped me with excessive memory usage.

Preload radius makes no difference for me, lowest to highest setting.

[Mr_sukebe]

39 minutes ago, T.Power said:

Preload radius makes no difference for me, lowest to highest setting.

Go try seeing how much VRAM is used.  Quc and myself have seen circa 1GB difference between a setting of around 45% and 100%

[T.Power]

2 hours ago, Mr_sukebe said:

Go try seeing how much VRAM is used.  Quc and myself have seen circa 1GB difference between a setting of around 45% and 100%

No major difference.  Tried 100 and 80000, the difference is 100mb VRAM.

Edited May 8 by T.Power

[Qcumber]

1 hour ago, Mr_sukebe said:

Go try seeing how much VRAM is used.  Quc and myself have seen circa 1GB difference between a setting of around 45% and 100%

I would agree with that. In my tests there is a definite VRAM impact of about 1Gb

 

 

 

[plott1964]

So, if you find that VRAM usage is too high, what can you do about it?

[Mr_sukebe]

2 hours ago, plott1964 said:

So, if you find that VRAM usage is too high, what can you do about it?

my starting point would be to suggest looking here:

 

 

[plott1964]

Awesome Mr_sukebe! Thanks.