How does the High Memory Usage detection behave with Page Fault thresholds?

Sohel_Rashid — Mon, 07 Sep 2026 12:24:17 GMT

Hi Dynatrace community Team,

I would like to understand the expected behavior of the High Memory Usage on Host detection when using custom page fault thresholds.

Currently, we have configured:

Memory usage threshold: 80%
Windows page fault threshold: 100 faults/sec
Linux/Unix page fault threshold: 20 faults/sec
Detection mode: Based on custom settings

The configuration states that an alert is generated when both memory usage and memory page fault rate thresholds are exceeded.

Specifically, I would like to understand whether both conditions must be continuously exceeded for the defined number of samples before Dynatrace generates the problem.

Also, could you please clarify how the “defined amount of samples” is evaluated for the page fault rate?

Thanks in advance for your clarification.

Re: How does the High Memory Usage detection behave with Page Fault thresholds?

p_devulapalli — Tue, 08 Sep 2026 00:52:54 GMT

@Sohel_Rashid Yes, both the conditions needs to be met for the defined samples/duration to alert

https://docs.dynatrace.com/docs/shortlink/event-types-resource#memory-saturation

Windows: By default, Dynatrace alerts if memory usage is higher than 90% and the memory page fault rate is higher than 100 faults/s within 18 of 30 10-second intervals.
Linux: By default, Dynatrace alerts if memory usage is higher than 80% and the memory page fault rate is higher than 20 faults/s within 18 of 30 10-second intervals.

topic Re: How does the High Memory Usage detection behave with Page Fault thresholds? in Open Q&A

How does the High Memory Usage detection behave with Page Fault thresholds?

Re: How does the High Memory Usage detection behave with Page Fault thresholds?