Hi Roman,
We have abap/heap_area_nondia 12000000000 Byte, Heap Quota for Non-Dia Processes.
In that Screenshot,
First Background Job is Using 12 GB of Heap Memory and 13 GB of Extended Memory.
[It might have also Used the Extended Memory Even before reaching the Quota]
Second Job is Using 6 GB Heap memory which is less than the Quota allocated but has Used Extended Memory as well which deviates from the SAP Theory of Non-Dia uses Roll, Heap and then Extended Memory.