TLDR Shoeb inquired about creating an APDEX dashboard for all services in Signoz v0.28.0. Srikanth clarified how to achieve this and explained the formula used for calculation.
Srikanth Hi I have updated Signoz v0.28.O and from release note I can see some features/fine tuning of APDEX. Can we create a dashboard of APDEX for all service in this version?
I didn’t understand your question properly. _Can we create a dashboard of APDEX for all service in this version?_ This was always possible. APDEX is a simple derived metric from the existing data.
What I mean from a single dashboard's panel can we get value APDEX for all services based on variable like below.
Yes, you write query and formula to achieve it.
Can you please give the a guideline which traces option we need to use?
As per code we can see formula is like
```APDEX_TRACES = '((B + C)/2)/A',
APDEX_DELTA_SPAN_METRICS = '(B + C/2)/A',
APDEX_CUMULATIVE_SPAN_METRICS = '((B + C)/2)/A',```
But still can not determine the appropriate value of A,B and C.
A - total requests, B - requests with duration < threshold, C - requests with duration < 4 * threshold.
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