Cumulative alloc keeps on increasing (#show memory)

Hello,

 

I've tried to find some detailed information on the #show memory command, and what the numbers mean. But I couldn't find anything conclusive. On our lab system (SD3820, 150 sessions, SCX6.3.5 Patch 1, Build 95) we've seen a steady increase in "cumulative alloc".

 

Below a snapshot of the #show memory from this afternoon:

 

ACME-LAB_IMS# show memory
  status       bytes       blocks    avg block  max block
 -------- -------------- ---------- ---------- ----------
current
 free         1391865960         40   34796649 1391807716
 alloc         660523288      66743       9896          -
 internal           1504          7        214          -
cumulative
 alloc        6241870240    5516686       1131          -
peak
 alloc         660729576          -          -          -

And below a snapshot of this evening:

 

ACME-LAB_IMS#
ACME-LAB_IMS# sh memory
  status       bytes       blocks    avg block  max block
 -------- -------------- ---------- ---------- ----------
current
 free         1391514920         32   43484841 1391459460
 alloc         660874328      66793       9894          -
 internal           1504