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There is a lot of misinformation floating around for the memory requirements for the Exchange 2019 Edge role. I find learn.microsoft.com indicates 64GB is the minimum. When I run the HealthChecker it recognizes the Edge role and indicates 128GB is the minimum, I believe this may be an oversight. One common outside source indicates 6GB is recommended for the Edge 2019 role which I believe may not be correct but does closely match with real-world numbers.
When I look at a heavily loaded Edge server servicing 500 or more users with the recommended 64GB, I find it rarely consumes more than 5GB and 8GB cache. These actual memory use statistics aren't anywhere near 64GB.
Is 64GB actually a realistic requirement for the Exchange 2019 Edge role and if so, does anyone know what possible scenario(s) would cause Edge to use any significant amount of it?
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Hi @The Network Company ,
Just wondering if you have had a chance to check the replies provided. Feel free to post back if you have any further concerns or questions.
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I don't think that is realistic, no. And I don't run the Edge role with that much. 8GB has worked in every version of Exchange I have used for that role.
I worry more about disk space and ensure I will have enough to handle the que database.
Remember, 64GB is not a requirement, its "recommended" :)
https://learn.microsoft.com/en-us/exchange/plan-and-deploy/system-requirements?view=exchserver-2019
Hi @The Network Company ,
Agree with Andy that 64GB for Edge 2019 is a recommendation, rather than a restriction. So we can still run Edge 2019 on servers euipped with less memory as long as it can handle the workload occurred on the server.
Here is a relevant blog which could be helpful:
(The article focus on the memory requirement for Mailbox server, but the concept can be applied to Edge role as well.)
Why Exchange 2019 Demands 128 GB Minimum Server Memory
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