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ERP AAS / dialogue instances - Best Practice

Mar 03, 2017 at 01:24 PM

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Former Member

Hi

Let's say I have a Windows Server with 128GB RAM and 2 E5 processors which I want to use as Additional Application Server or dialogue instance or however you call it.

How should I design the SAP Instance(s)? Is it better to have e.g. 3 instances on this server with ~20 work processes and 1/3 of RAM each, or should I install 1 instance with 60 processes and 3/3 of RAM? Is there a reasonable limit, e.g. 16cores = 16 Instances or even only 16/4=4 instances?

Would you make a "background-only" instance? Or maybe keep background-processes on the PAS whereas dialog users go for the (remote) AAS?

Is there any kind of guide on this topic?

Regards

Michael

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3 Answers

Nicholas Chang Mar 22, 2017 at 11:18 AM
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Hi Michael,

There are pro and cons on each method. For eg, having multiple AAS in one server can avoid maximum limit of dialog session reached on one instance. Also, by keeping the wp small on each instance, it helps reduce traffic overflow to dispatcher port. Just my 2 cents worth, is a practice to install multiple instances on one server for SD benchmark to gain better performance and throughput.

Hope it helps,

Nicholas Chang

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Bartosz Jarkowski Mar 03, 2017 at 01:59 PM
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Based on your question I assume you have another PAS instance already running.

I would create only one AAS, as it's easier to maintain. Can't really see any advantages of having multiple AAS on one server.

Anyway I'm looking forward to see other people opinions :)

Best regards

Bartosz

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Former Member Mar 22, 2017 at 10:32 AM
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Hi

I already have a PAS, of course. Anyway Im also curious about other opinions?

Reagrds

Michael

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