Rolling Kernel Switch (RKS)Locate this document in the navigation structure

The rolling kernel switch (RKS) is an automated procedure that enables the kernel in an ABAP system to be exchanged without any system downtime. RKS can also be used to make parameter changes while the system is running. Usually, RKS only causes minimal restrictions for users of the system.

The advantages of the rolling kernel switch are:
  • Kernel exchange with no system downtime
  • The procedure is automated
  • The procedure can be started and monitored using standard tools in SAP MMC and in the system overview (transaction SM51).
  • No or minimal impact on system users
  • Static parameters can be changed while the system is running
    Note Parameters that affect the whole system should be checked carefully. Parameters that affect the system landscape (e.g. with ASCS instance or database in their name) cannot be changed with RKS.
Related Information
Description of the RKS Procedure
Using RKS
Preparing RKS
Starting RKS
Monitoring the RKS Procedure