https://wiki.scn.sap.com/wiki/display/Basis/How+to+Reset+different+SAP+buffers
/$SYNC - Resets the buffers of the application server
/$CUA - Resets the CUA buffer of the application server
/$TAB - Resets the TABLE buffers of the application server
/$NAM - Resets the nametab buffer of the application server
/$DYN - Resets the screen buffer of the application server
/$ESM - Resets the Exp./ Imp. Shared Memory Buffer of the application server
/$PXA - Resets the Program (PXA) Buffer of the application server.
/$OBJ - Resets the Shared Buffer of the application server.