Monitoring the Memory Management System

You should monitor the SAP system during operation to check that Memory Management has the necessary resources, and that frequent paging at operating system level does not slow down the system or cause any bottlenecks.

The following tools are suitable for monitoring:

• Tune Summary (transaction ST02)

  The current status and the memory resource usage for a specific SAP application server are displayed here. The procedure is described in Checking Roll /Paging Area and Extended Memory using Transaction ST02.

• Transaction ST06 for monitoring the available swap space in the host system.

  For more information, see Monitoring Memory Resources Using Transaction ST06.

• CCMS Alert Monitor (transaction RZ20):

  For more information, see Tutorial in the CCMS documentation

• Overview of Users (transaction SM04):

  Enter transaction code SM04, or from the menu choose  Tools  Administration  Monitor  System Monitoring  User Overview , and then  Goto  Memory , to display the amount and type of memory occupied by the user contexts for all users of a specific SAP application server.

  For more information, see Display and Manage User Sessions

• Overview of Work Processes (transaction SM50)

  Select the Detail button to display the memory resources that have been reserved for a certain work process.

  For more information, see Displaying and Controlling Work Processes.

  By monitoring work processes in the SAP system (transaction SM50) or from outside the system ( dpmon program at operating system level), you can determine the status of the work processes in relation to the PRIV mode. If work processes are often switched to the PRIV mode, you must increase the extended memory and/or adjust the limit for the extended memory.

  For more information, see Functions of the SAP Memory Management System

  In this case, please contact SAP.

• You can evaluate this information for all the work processes by using transaction SM66.

• You can determine the Swap Space Requirements at SAP and operating system level.