Stall metrics are creating a peak of +1 during the 15s period when the defined stall duration (by default 30s) is reached by the underlying request. Else no value or 0 value for those stall metrics.
In case the same request is called several times in // (multithreading), stall metrics can be strictly higher than 1 if several requests running in // are longer than the stall value for the first time during the same 15s period
Stalled metrics names ended with %Stall
Stalled metrics can be used to create stall alerts
Stalled metrics changed from agent version 4.11
- before
- the stall duration is only 30s
- the +1 is valid as long as the underlying request/call continues
- it is possible to be alerted after a certain duration by counting the number of period the request stays on stall
- after
- the stall duration is 30s by default but can be defined by set of metrics
- the +1 is valid only during the 15s period where the stall threshold has been reached
- it is possible to be alerted after a certain duration by defining this duration as stall threshold