Show in the UI when an index build is ongoing, and when it completes
When indexes are built from an application or a mongorestore there's no way to see if it's ongoing in the UI.
There should be an indication in the "Real-time" tab saying that an index on collection X is in progress. This would explain why performance is currently impacted.
It would be good to see index start and end marked on the "Metrics" visualizations so we can see the impact of index builds on IOPS, CPU, memory etc. This could help understand if we need to upscale the cluster.
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Bradley Wilson-Hunt commented
To add to this, the project activity feed (https://cloud.mongodb.com/v2/$ID#/activity) only mentions when an index build has succeeded. There is no indication at all when the index is created other than pulling the logs of the server to understand what is happening.