Calculation of memory footprint

Question

I have a Weblogic server which has Memory Utilization (MU), taken from DynaTrace APM, as shown in below table.

My understanding of memory utilization is that it is amount of memory used by program. Now it certainly cannot be maximum and minimum because it will not truly represent utilized (right?) so I am going to average out below % and I am getting 52%.

So does it mean that memory footprint is 52%?

Second question: These statistics are from a APM. Now I also I have maximum memory and memory used. If I do simple calculation to calculate memory utilization (MU) manually by (memory-utilized/maximum-memory) then I do not get exact same figure as given by APM for same time in MU chart.

• Does it mean that I cannot calculate memory footprint simply as (memory-utilized/maximum-memory)?

• APM does more calculation for getting true memory foot print? So how can I calculate memory foot print on my own?

  **Date**            **MU (%)**
  2016-01-26T15:15:00 42.47219781
  2016-01-26T15:30:00 46.03047265
  2016-01-26T15:45:00 46.54384698
  2016-01-26T16:00:00 47.25852017
  2016-01-26T16:15:00 48.60865614
  2016-01-26T16:30:00 50.23378059
  2016-01-26T16:45:00 51.82248162
  2016-01-26T17:00:00 51.95340814
  2016-01-26T17:15:00 52.77441474
  2016-01-26T17:30:00 52.83012288
  2016-01-26T17:45:00 52.85740628
  2016-01-26T18:00:00 54.01675551
  2016-01-26T18:15:00 54.40046963
  2016-01-26T18:30:00 54.79707947
  2016-01-26T18:45:00 54.9685574
  2016-01-26T19:00:00 56.83530307
  2016-01-26T19:15:00 55.7976905
  2016-01-26T19:30:00 57.44057855
  2016-01-26T19:45:00 57.22555271
  2016-01-26T20:00:00 57.19549255
  2016-01-26T20:15:00 56.95526801
  2016-01-26T20:30:00 57.41918165
  2016-01-26T20:45:00 57.93780653
  2016-01-26T21:00:00 57.42303196
  

Answer 1

If you have tool specific questions on Dynatrace APM I suggest you post them on our APM Open Q&A Discussion forum:

I also have a YouTube Tutorial on Memory Analysis with Dynatrace in case thats of interest.