# High memory data usage?
**URL:** https://qa.fmod.com/t/high-memory-data-usage/20126
**Category:** Unity
**Created:** [April 17, 2023, 2:15pm UTC](https://qa.fmod.com/t/high-memory-data-usage/20126 "2023-04-17T14:15:55Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@ironsloth](https://qa.fmod.com/u/ironsloth)
#### Post date: [April 17, 2023, 2:15pm UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/1 "2023-04-17T14:15:55Z")
Hello,
I’m working for a 3d game in unity and am currently trying to wrap my head around performance… especially ram usage. I have around 260 mo of ram usage 60 for sample and 200 for data.
I have 2 main types of events, sound emitters on prefabs of the map and 2d “global events” which play non stop and switch music and 2d ambience based on a zone parameter.
I suspected the high usage is because I have too many emitters loaded on the map but even when I disable all the emiter I get around 150mo of data usage only for the global 2d events…
Is it because my events are too “heavy” (they use a lot of nested events, global parameters, different mixer groups etc). Or is it something in particular I missed that consume a lot of ram ?
Does using one “main” event for all the ambiance / music of a game is considered “bad practice” ?
It look like the convolution reverb I have on the mixer use 30mo of data even when unused too.
Thanks.
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### Author:  [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)
#### Post date: [April 19, 2023, 1:15am UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/2 "2023-04-19T01:15:54Z")
Hi,
I will link to our documentation which touches on memory management: [FMOD API | White Papers - Memory Management](https://fmod.com/docs/2.02/api/white-papers-memory-management.html).
FMOD is designed to handle large amounts of Emitters through our Virtual Voice system outlined here: [FMOD API | White Papers - Virtual Voices](https://fmod.com/docs/2.02/api/white-papers-virtual-voices.html).
> [@ironsloth](#):
>
> It look like the convolution reverb I have on the mixer use 30mo of data even when unused too.
Could I get a screenshot of this reverb in your mixer?
> [@ironsloth](#):
>
> Or is it something in particular I missed that consume a lot of ram ?
If there are any effects that are not modulating and/or changing in real-time, it could help to bake those effects into the sound files in an external DAW.
The events are currently rather complex but nothing too insane.
hope this helps!
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### Author:  [@ironsloth](https://qa.fmod.com/u/ironsloth)
#### Post date: [April 19, 2023, 7:52am UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/3 "2023-04-19T07:52:40Z")
Hi thanks for the quick reply.
this is the mixer convolution reverb (I forgot it has a delay too)
The mixer have quite a lot of groups too… but not much processing in theses
The global events have some processing inside them
-2 simple reverb
-2 compressor
-8 eq (mostly dynamic filtering for wind and water)
-1 transmitter
Does the nested events cause to double the data when placing this way in a parameter sheet ?
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### Author:  [@ironsloth](https://qa.fmod.com/u/ironsloth)
#### Post date: [April 19, 2023, 8:07am UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/4 "2023-04-19T08:07:20Z")
PS: I just noticed I leaved the impulse response as a 192khz file so maybe that was linked !
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### Author:  [@ironsloth](https://qa.fmod.com/u/ironsloth)
#### Post date: [April 19, 2023, 5:02pm UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/5 "2023-04-19T17:02:40Z")
so I did more profiling… the convolution reverb used still 30mo BUT when I removed and add it again the ram usage lowered to 9mo… I’m not sure what happened but it seems to stay like that.
Even when playing 0 events I have around 47mo of ram usage… is this expected behaviour ?
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### Author:  [@Connor\_FMOD](https://qa.fmod.com/u/Connor_FMOD)
#### Post date: [April 20, 2023, 6:23am UTC](https://qa.fmod.com/t/high-memory-data-usage/20126/6 "2023-04-20T06:23:16Z")
> [@ironsloth](#):
>
> Does the nested events cause to double the data when placing this way in a parameter sheet ?
No, it is the same as playing two individual events.
> [@ironsloth](#):
>
> Even when playing 0 events I have around 47mo of ram usage… is this expected behaviour ?
The amount can be affected by how much memory is being assigned when initializing the system, explained here: [FMOD API | White Papers - Memory Management](https://fmod.com/docs/2.02/api/white-papers-memory-management.html). Yes, it is expected behaviour for some memory to be used even when there are no events playing.