Profile Parameters of Memory
Management 
Use
Profile parameters enable you to set up your memory management system to get maximum benefit from it. By setting the parameters correctly, you can adjust memory management exactly to your resources and requirements.
Integration
The default parameter settings usually ensure the smooth operation of your memory management system. Monitoring the Memory Management System enables you to uncover possible weak spots.
This section explains what each parameter does. The different settings for each platform are described in the Platform-Specific Description of Memory Management.
Features
The parameters govern how the memory management system behaves and restrict it so that it does not exceed operating system or hardware limitations. Certain parameters may restrict individual work processes, and quotas may limit resources used by all work processes, for example, the extended memory. There are also parameters that are used for configuring the memory management statistics.
Controlling Memory Management
abap/heaplimit: Work Process Restart
Memory Management Resources for One Work Process
ztta/roll_extension: Limit for Extended Memory
ztta/roll_extension_dia: EM Quota for Dialog Work Processes
ztta/roll_extension_nondia: EM Quota for Non-Dialog Work Processes
abap/heap_area_dia: Heap Memory Limit for Dialog Work Processes
abap/heap_area_nondia: Heap Memory Limit for Non-Dialog Work Processes
abap/heap_area_total: Total Quota for Heap Memory
ztta/roll_first: Size of the Initial Allocation from the Roll Area
Memory Management Limitations
abap/heap_area_total: Heap Memory Limit
em/initial_size_MB: Extended Memory Pool Size
rdisp/ROLL_SHM: Roll Buffer Size
rdisp/ROLL_MAXFS: Maximum Roll File Size
rdisp/PG_SHM: Size of the Paging Buffer
rdisp/PG_MAXFS: Maximum Size of SAP Paging File
em/blocksize_KB: Segment Size for the Extended Memory
Memory Management Statistics
em/stat_log_size_MB: Statistics - User Context Size
em/stat_log_timeout: Statistics - User Context Size
Parameters for controlling the Release of SAP Memory for the Operating System
es/disclaim_coasting_time_alloc
es/disclaim_coasting_time_free