Symptom
Diverse
error messages that refer to memory bottlenecks, or, more precisely, a
swap space bottleneck. For example, System Panic; cmemreserve:
reservation overrun; ENOMEM, Not enough core; ENOSPC, No space left on
device; SIGDANGER (under AIX only). In the SAP System, the SAP system
log message "no memory of class perm" is output.
This problem can occur with SAP processes and external processes as well. The relevant process cannot allocate anymore heap memory. This can lead to the database operation being ended or SAP work processes being stopped.
Error messages in the SAP System appear in the developer trace files dev_disp, dev_w<n> in the system log and in dumps. The following messages may appear: TSV_TNEW_;._NO_ROLL_MEMORY; NO_MEM; NO_MEMORY; RESIZE_EM_ALLOC_ERROR, Storage class PERM. This problem mostly occurs if background jobs are active with large amounts of data.
This problem can occur with SAP processes and external processes as well. The relevant process cannot allocate anymore heap memory. This can lead to the database operation being ended or SAP work processes being stopped.
Error messages in the SAP System appear in the developer trace files dev_disp, dev_w<n> in the system log and in dumps. The following messages may appear: TSV_TNEW_;._NO_ROLL_MEMORY; NO_MEM; NO_MEMORY; RESIZE_EM_ALLOC_ERROR, Storage class PERM. This problem mostly occurs if background jobs are active with large amounts of data.
Possible Causes
There is no more swap space available
The
highest value for one of the SAP profile parameters that limit the swap
space usage has been exceeded. In this case, the following parameters
are relevant:
abap/heap_area_dia, abap/heap_area_nondia and
abap/heap_area_total.
Increase the swap space or decrease the SAP Extended Memory.
If the swap space already corresponds to the SAP recommendations, 1.5
to 2 GB may still be required. There should always be several hundred MB
of free swap space available. You can reduce the maximum swap space
need of the SAP System by reducing the value of parameter abap_heap_area_total. You
can also distribute the load onto several application servers and
increase the roll area. Check if the maximum process size (operating
system parameters) is sufficient.
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