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 (global extended memory included), roll and paging memory usage for each application server of the SAP system.

The extended memory (EM) contains data associated with work processes, such as variables, lists and internal tables.

The 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. For example, this might be data used 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 the all-time peak usage of the 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 the global extended memory	MB	Server	Any server
EMG_TOTAL	Total size of the global extended memory	MB	Server	Any server
EMG_USED	Global extended memory used	MB	Server	Any server
EMG_USED_P	Global extended memory used as a percentage	%	Server	Any server
EM_TOTAL	Total size of the extended memory	MB	Server	Any server
EM_USED	Extended memory used	MB	Server	Any server
EM_USED_P	ABAP extended memory used (server)	MB	Server	Any server
EM_USED_P_SYS_MAX	Maximum ABAP extended memory used (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: Maximum size in the shared memory (all servers)	MB	System	Any server
PG_CFG_SYS_TOTAL	Paging area: Maximum 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: Maximum peak paging area used (all servers)	MB	System	Any server
PG_SYS_USED_MAX	Paging area: Maximum currently used paging area (all servers)	MB	System	Any server
PG_SYS_USED_P_MAX	Paging area: Maximum 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) as a percentage	%	Server	Any server
ROLL_USED_P	Roll area used	%	Server	Any server
ROLL_USED_P_SYS_MAX	Maximum roll area used (all servers)	%	System	Only application server