Huge Memory Leak - D3D9 "Copy Depth Buffer" big issues after ALT+TAB

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2 months 1 week ago - 2 months 1 week ago #1 by yurgenschn
I've installed Reshade 4.9.1 on Half-Life 2: Update (DX9), and if I ALT+TAB with "Copy Depth Buffer Before Clear Operations" option selected, I get a NASTY MEMORY LEAK... (i need it to get depth+normal info for qUINT MXAO).

How it happens on my end: If I ALT+TAB and leave the game in the background for 1s-ish, SSD (IO) usage instantly maxes out at 100%, and as long as the game's window is in the background, RAM usage ramps up insanely fast (takes about 6 seconds to fill 16GB up). What that also means is: If I Alt+tab quickly out and in, SSD IO will max out, but RAM usage will increase just a bit, not ramping up to max.

After ALT+TABbing, the only way i've found to get RAM to a lower usage, and to normalize SSD IO usage, is to uncheck the option or close the game.

I have tested with and without any effect/shader enabled, but it doesn't seem to matter. I have not tested without any shader installed.

System info:
CPU: Intel i5 10400f
RAM: Crucial 16GB 2666MHz CL14
GPU: AMD RX 570 (21.9.2)
SSD: KINGSTON A400 480GB
SO: Windows 10 21H2
Reshade Version: 4.1.9
Last edit: 2 months 1 week ago by yurgenschn. Reason: Formatting and rephrasing. No new info.

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2 months 2 days ago #2 by Judge_K
Are you running the game in Full Screen Exclusive mode?
With my DX9 games (especially pre-windows 7 games), I get some strange behavior when I ALT+TAB (aka use the Windows desktop). I suspect that those games weren't really designed to run in a borderless window mode, which allows you to minimize the window, etc. Windows 10 has some full screen optimizations that cause some memory issues with older DX games.

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2 weeks 2 days ago #3 by Galmir
This is also happening to me in Portal (DirectX9). After alt-tabbing it starts leaking memory after ~10 seconds. It also leaks memory if I switch to windowed mode and minimize the game. It only happens when "copy depth buffer before clear operations" is enabled.

Specs:
CPU: AMD Ryzen 5 3600
GPU: Geforce RTX 3070
RAM: Crucial 16GB DDR4/3000MHz
OS: Windows 10

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