Here we would like to draw your attention to SM51 transaction code in SAP. As we know it is being used in the SAP BC-CST (Client/Server Technology in Basis) component which is coming under BC module (BASIS).SM51 is a transaction code used for Server List in SAP.
It comes under the package STSK.When we execute this transaction code, RSM51000_ALV_NEW is the normal standard SAP program that is being executed in background.
SAP SM51 menu path
See the possible menu paths to access the same report by avoiding entering the transaction code.
Tools → Administration → Monitor → Performance → Exceptions/Users → Active Users → SAP Instances
Tools → CCMS → Control/Monitoring → Performance → Exceptions/Users → Active Users → SAP Instances
Tools → Administration → Monitor → System Monitoring → Servers
Transaction SM51 technical data table