Hello, this is Mackerel Team CRE's 
id:masarasi. We would like to inform you about the content of this update.
- Graph on Alert Notifications and Alert Details Screen Will Now Display Only the Metric that Caused the Alert
- Specified Period Will Now Be Carried Over and Displayed After Switching Graph to Full Screen
- Updates to Custom Dashboard Auto-Generation Feature
- Now Possible to Notify Slack and Microsoft Teams of Mackerel Status Information
Graph on Alert Notifications and Alert Details Screen Will Now Display Only the Metric that Caused the Alert
Alert notifications and the alert details screen display a graph of metrics related to the alert. Until now, all the metrics posted to the graph were displayed, so it was sometimes difficult to check the status of the metric that caused the alert when a large number of metrics were being posted to the graph.
With this update, by default, only the metric that caused the alert will be displayed, making it easier to check the status of the metric that caused the alert. Additionally, on the alert details screen, you can switch between showing and hiding other metrics by clicking on the legend below the graph.
Specified Period Will Now Be Carried Over and Displayed After Switching Graph to Full Screen
Until now, when a user had specified a display period for a graph such as on the host details screen and then switched to full screen, the display period would be reset, requiring the user to specify it again. With this update, the specified display period will be carried over and displayed in full screen.
Updates to Custom Dashboard Auto-Generation Feature
We made the following updates to the Custom Dashboard Auto-Generation feature.
- It is now possible to generate a graph of VolumeBytesUsed from Aurora.
- An extra line will now appear at 100% on the CPU usage graph.
- The following graphs are affected.
- cpu.{user,system} (system metrics)
- custom.ec2.cpu.used (Amazon EC2)
- custom.rds.cpu.used (Amazon RDS)
- The following graphs are affected.
Now Possible to Notify Slack and Microsoft Teams of Mackerel Status Information
It is now possible for the first time to notify Slack and Microsoft Teams of Mackerel status information. The "SUBSCRIBE" button at the page's top-right can be used to set up a Slack Incoming Webhook or Microsoft Teams workflow to receive notifications.
