DCS high RAM usage issue

[jackmckay]

Hi,

I've noticed that DCS uses around 24GB RAM on 2.5.6.58125. Isn't that too much? Performace is very bad after this update so this might be the issue here. Thoughts?

Rgds

[Flappie]

Depending on the mission (and therefore, the map), DCS requires a PC equiped with 32 GB of RAM. See here.

[jackmckay]

On 12/12/2020 at 4:50 PM, Flappie said:

Depending on the mission (and therefore, the map), DCS requires a PC equiped with 32 GB of RAM. See here.

Thanks on reply. I got that clear but still it isnt the same FPS as before latest update even with 32GB of RAM.

 

Tip: reducing terrain textures to low helps freeing lot of RAM.

 

Isnt that FPS drop a texture issue somehow?

Also I notticed that DCS folder has many duplicate/simmilar texture files scattered around modules and module packs.

What if there's some lightweight and centralised texture option?

[Furiz]

This is what I get on a carrier, Syria map, I have 16 GB RAM at 3666MHz, i5 9600KF and ROG Strix RTX 2060 Super, I think it is using too much RAM. Sometimes it goes up to 10 GB RAM, don't know if that's normal or not, but feels like too much.

[Wali763]

On our Squads Trainingmap my RAM-usage is very high. Very much too much!

[Jarhead_SGT]

Seconded. Since two patches ago RAM usage has spiked enormously, especially on the Syria map.  I use VR, 32gb ram and never got close to maxing out.  Now on multiplayer servers I'm hitting 100% regularly.

 

Causes huge FPS drops and other issues.  No settings changes on my side and I've tried clearing out the shaders.

 

i7700K, 32GB Ram, 2080TI, Index VR

 

UPDATE:  Attempted Steam VR beta - and it wouldn't render the cockpits on multiplayer servers.  It took almost 30 seconds for the cockpit to appear!!!!  Very very odd.  Also odd is that windows only shows half the ram in processes view, but Performance shows normal.  Settings below, Pixel Density 1.0

 

 

Edited December 24, 2020 by Jarhead_SGT

[Wali763]

Yesterday I had (Im still in 2D) really bad stutters in MP on PG-map. Never have experienced this before. My system for 2D is quite ok.

 

9600K at 5Ghz, 2070Super and 32GB of 3600Mhz RAM.

Edited December 24, 2020 by Wali763

[Jarhead_SGT]

Hoping someone has a magical cure LOL

 

[Thinder]

On 12/24/2020 at 4:22 PM, Jarhead_SGT said:

Hoping someone has a magical cure LOL

 

 

Yes. Lower latency + proper paging files settings and your bandwidth will be freeer for your gaming for the same capacity, there is no secret here, when your RAM is not well bounded to your CPU, it works slower, the CPU controller throttles down and it affects every bus. It's called a bottleneck.

Edited October 2, 2021 by Thinder

[Mr. Big.Biggs]

10 minutes ago, Thinder said:

 

Yes. Lower latency + proper paging files settings and your bandwidth will be freeer for your gaming for the same capacity, there is no secret here, when your RAM is not well bounded to your CPU, it works slower, the CPU controller throttles down and it affects every bus. It's called a bottleneck.

 

Oh Rapture, Thinder has found the cure from everyone’s high ram usage problem. 
Thanks for finally giving us all the fix we have been looking for for several years!! 
regards.

[Thinder]

42 minutes ago, Mr. Big.Biggs said:

Oh Rapture, Thinder has found the cure from everyone’s high ram usage problem. 
Thanks for finally giving us all the fix we have been looking for for several years!! 
regards.

 

LOL! I wish I had given it to you but, bummer, you still have to work for it and it's not free.

 

It's not a problem of capacity but how fast the data filling your RAM can be recycled, so de facto, you need to find a ballance between frequency and latency, what your CPU controller can cope with, how it handles it, it's different between Intel, AMD or older Ryzens who prefer frequencies to latency for example, that is up to 3200 MHz.

 

In short, you can have a 50l tank, if your drain is of a slmaller diameter than the tap, you have a problem regardless of the capacity of the tank.

 

As a thumb rule, even with 32Gb of RAM, if your RAM is well bounded to your CPU you will notice simply because for the same amount of data to process coming from the CPU, there will be less at a given time to be processed by the RAM because it will do it faster and the CPU will not throttle down and strangle the buses, limiting the amount of data the whole system can process.

 

For a gaming PC, the best is to start by allocating a different disk to your paging files and background apps after having disabled all those you don't use, Windows will not clutter your RAM during gaming if it has its own paging files in a different disk to work with.

 

Then best for Intel and AMD might be different but controllers limitations are the same and the indication of that is given by the recommanded frequency, both 3200 Mhz, but for Intel users, I recommand that you do some serious research work in Intel forums and ask people about their own experience, that's how I figured how to remove the RAM bottleneck on my Ryzen.

 

Then number of ranks per stick, more than 4 ranks and the controller will also strugle, more to it, with 1 X 4 ranks you get interleaving and it does help the CPU further.

 

Using more RAM and/or higher frequencies is absolutly no guaranty of gain, first it depends on the silicon lottery, if you're lucky your CPU might handle a slightly higher frequency than that exactly same of your pal although it remains to be seen what the gain will be under load, because this is when the sh!t hits the fan.

 

 

Edited October 2, 2021 by Thinder

[Thinder]

!

Edited October 4, 2021 by Thinder