These release notes give an overview of the changes for Release 2021-02.x to 2021-08.x of the Wavefront service.
Delta Counter Changes
The implementation of delta counters, which was deprecated last year, will reach end of life on April 4th, 2021.
Wavefront updates the system dashboard and integration content. But, you have to update dashboards, charts, and alerts that use custom delta counters. See Wavefront Obsolescence and Remediation for details.
Create New PagerDuty Incident For Each Failing Series
You can now configure alerts to receive separate PagerDuty notifications for each series that meets the alert condition. Select Advanced > Unique PagerDuty Incidents when you create or edit an alert.
With this setting turned on, you get separate PagerDuty notifications for both of the following series because the
env tag is different.
#first series app.errors source=machine env=prod #second series app.errors source=machine env=stage
New and Changed functions
limit() Function Supports Histograms
You can now use the limit() function on histogram data.
mvalues() function to count the number of the unique values over a shifting time window.
The example below returns the number of unique bytes sent to and from the database, grouped by environment over a 5-minute time window.
mvalues(5m, ts(~sample.db.bytes.sent), env)
Tracing Improvements and New Features
Zoom In Setting on Application Map
The Fade Labels on Zoom setting hides labels of small services and gradually exposes them as you zoom in on the application map. See Customize the application map view.
|The Fade Labels on Zoom setting is not selected:||The Fade Labels on Zoom setting is selected:|
New Operation Dashboard to See Operation RED Metrics
This default, read-only dashboard lets you explore RED metrics of an operation. See Operation Dashboard.
span.kind Tag Required For External Java Databases
span.kind tag is required when you define external databases for Java Applications. See required span tags for an external Java database service.