Proof of concept, so that you can gain initial experience
WebServices
Planning ahead: Ideally, your SAP system administrator should make the necessary adjustments to your system landscape before end users are affected. This requires careful planning and anticipation of long-term trends.
A BW system often plays a very central role in larger companies. Here the data from the various connected source systems are analysed and reported centrally. A previous customer of mine had a BW system, to which a total of over 20 other SAPP production systems were connected. With such a large and mostly living system landscape, it is normal that individual systems are dismantled from time to time. However, especially with large SAP landscapes, there are strict regulations regarding the permissions of technical RFC users. For this reason, the simple "right-click —> delete" of a source system in RSA1 will often not lead to the target, but rather to a failed permission check. With this blog post, I'll show you a workaround on how to clean a source system from a BW system using the RSAR_LOGICAL_SYSTEM_DELETE and RSAP_BIW_DISCONNECT function blocks.
Application layer
SAP provides support packages: in SAPNet - R/3 Frontend in SAPNet - Web Frontend on Collection CDs Requirements The Change and Transport System is set up correctly. There is enough space in the transport directory (UNIX: /usr/sap/trans). You must have the permissions [page 7] for the SAP Patch Manager. You must be registered with the company 000. You must have called the transaction SPAM. You are using the latest SPAM version. Procedure Support Packages from SAPNet - R/3 Load Frontend Before loading a Support Package from SAPNet - R/3 Frontend, maintain the network parameters for logging in to the SAPNet - R/3 Frontend. Use Transaction OSSordering the desired support packages in the SAPNet - R/3 frontend. Download the requested support packages from SAPNet - R/3 Frontend into your SAPS system with Support Package. A list of support packages appears. You can select the desired support packages before loading. The uncompressed support packages are displayed in bytes. The size of the Support Package allows you to estimate the time it takes to load. Check the progress bar to see if the load was successful. To return to the SPAM entry screen, select Jump Back. Define the queue (page 17).
SAP Basis Operation is responsible for ensuring the technical functionality of an SAP system. It includes all the technical components mentioned above. These are used to perform the following tasks.
For administrators, a useful product - "Shortcut for SAP Systems" - is available in the SAP basis area.
If the software version changes during such an update, for example from S/4HANA 1909 to S/4HANA 2020, this is referred to as an upgrade.
As you can read in our Memory Parameter Post, the following 5 parameters are particularly important for memory management: abap/heap_area_total abap/heap_area_dia abap/heap_area_nondia ztta/roll_extension_dia ztta/roll_extension_nondia If you don't know exactly what a parameter might be called, it's worth using the F4 help here.