(DI-2302) Collector for ABAP Memory monitoring
The technical name of the Collector for ABAP Memory monitoring is /DVD/MON_CL_COL_BUFF.
This collector collects information about extended (extended global memory included), roll, and paging memory usage for each application server of the SAP system.
Extended Memory (EM) contains data associated with work processes, such as variables, lists, and internal tables.
Global extended memory (EG) is part of extended memory (EM). It contains user-specific data and can be accessed by all work processes. The EG is a part of the EM, which is used for multiprocessing. The EG contains data that does not belong to a specific user session. This may be data used for example for monitoring and statistics, table buffers of the database interface (DBI), or ABAP-shared objects that all work processes have access to independently of the user session.
The roll and paging buffers are the preferred working area of the roll and paging areas for an instance (application server). The remaining area is located on the disk as roll and paging files. The user context is stored in the extended memory and the roll area (when the job is rolled out of a work process). The paging area stores special data for the ABAP processor, while the extended memory stores a large portion of the internal tables of a program. This KPI shows all-time peak usage of paging memory
Default KPIs delivered with this collector
The following default KPIs are delivered with this collector:
KPI name | Description | Unit | Collected for | Server specification |
|---|---|---|---|---|
EMG_PEAK | All time peak usage of extended global memory | MB | Server | Any server |
EMG_TOTAL | Extended global memory total size | MB | Server | Any server |
EMG_USED | Extended global memory used | MB | Server | Any server |
EMG_USED_P | Extended global memory used | % | Server | Any server |
EM_TOTAL | Total size of extended memory | MB | Server | Any server |
EM_USED | Used extended memory | MB | Server | Any server |
EM_USED_P | ABAP Extended memory used (server) | MB | Server | Any server |
EM_USED_P_SYS_MAX | ABAP Extended memory used max. (all servers) | % | System | Any server |
PG_CFG_MEM | Paging area: Size in the shared memory (server) | MB | Server | Any server |
PG_CFG_SYS_MEM | Paging area: Max. size in the shared memory (all servers) | MB | System | Any server |
PG_CFG_SYS_TOTAL | Paging area: Max. size of the paging area (all servers) | MB | System | Any server |
PG_CFG_TOTAL | Paging area: Size of the paging area (server) | MB | Server | Any server |
PG_PEAK | Paging area: Peak paging area used (server) | MB | Server | Any server |
PG_SYS_PEAK_MAX | Paging area: Max. peak paging area used (all servers) | MB | System | Any server |
PG_SYS_USED_MAX | Paging area: Max. currently used paging area (all servers) | MB | System | Any server |
PG_SYS_USED_P_MAX | Paging area: Max. currently used paging area (all servers) | % | System | Any server |
PG_USED | Paging area: Currently used paging area (server) | MB | Server | Any server |
PG_USED_P | Paging area: Currently used paging area (server) | % | Server | Any server |
ROLL_USED_P | Roll area used | % | Server | Any server |
ROLL_USED_P_SYS_MAX | Maximum of roll area used (all servers) | % | System | Only application server |
The total size of the global extended memory (as shown e.g. by the report RSMEMORY) that is actually reserved by Application Server ABAP (AS ABAP) at the start is always higher than the value of em/global_area_MB, since AS ABAP needs to reserve additional space in the EG for ABAP shared objects.