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WebAS JAVA question: More WebAS vs. more server processes

Hello,

We plan to install a "big" SAP Netweaver Portal system for ESS, MSS, ... After sizing the system, we need to fit it on the available hardware, but we don't know which is the best approach for better using this HW.

Is there any advantage on installing more than one WebAS for the same SAP system on the same host, instead of installing just one instance with more server processes on it? Which is the best approach?

Thanks in advance,

jmiturbe

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1 Answer

  • Jun 21, 2008 at 11:27 AM

    Is there any advantage on installing more than one WebAS for the same SAP system on the same host, instead of installing just one instance with more server processes on it? Which is the best approach?

    I wouldn´t do that.

    I would increase the number of server processes instead.

    To check that out for your specific scenario you can install the system and use Mercury Loadrunner to check how to configure for the best throughput.

    Markus

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    • Hi,

      I have installed the same scenario a couple of years ago.

      My approach was:

      1 server with two server nodes on this server. The number of server nodes clearly depends on your memory!

      see the following note:

      Note 723909 - Java VM settings for J2EE 6.40/7.0

      #ServerNodes = (AvailableMemory / 1.5 GB)

      The scaling in general clearly depends on your expected load on the server

      But: If you are planning on using more that one application server I would not install them on one machine (Actually I've never done that) but use separate HW for each application server. I think this would be the better option

      As I said the configuration (1 server with 2 nodes) worked fine for almost 4 years now.

      You can still add more HW and more application servers when you get into trouble.

      Nevertheless. The approach with Load Runner is good. We used that too perform stress tests on our server and in order

      to get information about our possible maximum load (concurrent users etc.)

      Cheers