S4HANA upgrade sizing

Sizing for suite on HANA

This blog will explain options and tools you have for S/4HANA sizing for both new installations as well as upgrades.

Questions that will be answered are:

  • How can I execute S/4HANA sizing?
  • How do I execute the memory sizing for upgrading existing ECC system on non-HANA database to S/4HANA?
  • How do I execute CPU sizing for S/4HANA?
  • How do I execute disc storage sizing for S/4HANA?

Executing S/4HANA sizing

For both greenfield and existing ECC systems the SAP specific quicksizer for S/4HANA can be used: S4HANA quicksizer, then launch the tool from that page:

Quick sizer

For existing system you can pull data from existing system for greenfield you have to take either existing numbers from legacy system or input from project them.

The term quick sizing can be bit misleading. The tools is nowadays pretty advanced and requires quite some input.

How to fill the quicksizer is explained in OSS note 2467172 – How to size Fiori applications based on number of users.

Memory sizing for upgrading existing system

SAP has delivered a tool to help in sizing memory for S4HANA for upgrading an existing system. In your current ECC system you need to apply OSS note 1872170 – Business Suite on HANA and S/4HANA sizing report. This will deliver ABAP report /SDF/HDB_SIZING. You test this on development system and transport it to production for productive run.

S4HANA sizing program

Best to run this in background. You can then get the results in the spool of the batch job.

Sizing results

The results give an as good as possible estimation of memory sizing after the database conversion.

CPU sizing for S/4HANA

More details on CPU sizing can be found in OSS note 1793345 – Sizing for SAP Suite on HANA.

Disc space sizing for S/4HANA

Disc space storage sizing for S/4HANA can be found in extensive document on SAP site.

OSS notes

Before running the /SDF/HDB_SIZING program it is best to update it with the most recently available updates: 3104284 – HANA memory Sizing report – Advanced correction 15 or higher, 3149498 – HANA memory Sizing report – Advanced correction 16 and 3338309 – HANA memory Sizing report – Advanced correction 17.

Also apply this note: 3125526 – Report /SDF/HDB_SIZING_CLEAN cannot use dynamic variants.

5 thoughts on “S4HANA upgrade sizing”

  1. Hi,
    I am not able to run SDF/HDB_SIZING report in my Solman 7.1 system whereas able to run in 7.2.
    can you pls guide how to run report in solman 7.1.

    1. Hi Mukesh,

      Solution manager 7.1 has been out of support for years. You need to upgrade to Solution manager 7.2.
      If you need to run this as part of upgrade and going to Solution manager 7.2 on HANA, you can estimate about 50% of current size. Best is to check the current large tables in 7.1 and run clean up programs already in 7.1 system before upgrading and moving to HANA.

  2. Hello,
    many thanks for this Infos.
    I want to do sizing for an S/4HANA system (Greenfield). For example for FI I need to know user activity.
    where can I find this information in the old ERP system,
    1. which users are:
    -Low-activity users
    -Medium activity users
    -High activity users?

    2. Do I have (archiving) (Mon./ Residence time on DB) in my old system ?

    3. Information about: Objects, Items, % chg., % dsp.

    Many thanks

  3. Hello saptechnicalguru,
    Many Thanks for your Help.

    to my 3rd questions:
    I mean the sizing input for FI:
    Element: CO-PA-COST: Objects -Items – % chg. – % dsp. – Mon. – Arch. S.t. -E.t.

    Many Thanks

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