I have some doubts about the %memory of the image:
how is the memory value that is seen in that image calculated?
what timeframe is used?
What doubts do you have about this?
As far as I know, the value displayed = the value at the last check, so it is not the avg. across the selected timeframe but the most recent actual value. Memory health displays memory used by processes, excluding RAM used by system caches and buffers.
Host pages include two memory-related metrics for your hosts, Memory used and Page faults. Both measurements and other factors, are used to correlate and calculate host high memory incidents.
Percentage of total RAM used by processes. RAM used by system caches and buffers isn't included in this metric. Dynatrace calculates memory usage as:
memory_used = total_memory_size - (free_memory + active_memory + inactive_memory + reclaimamble_memory)
for your picture, the value of memory depends on the selected time period