• Describe what you need us to do:

Check why mirror data drops off precipitously on 2018-12-31. For example, for F29:

2018-12-29,155531
2018-12-30,153385
2018-12-31,75610

• When do you need this? (YYYY/MM/DD)

Need to be good by meetings at DevConf, but would prefer much sooner especially if there's a chance we're losing data.

• When is this no longer needed or useful? (YYYY/MM/DD)

n/a

• If we cannot complete your request, what is the impact?

even more blind than normal in terms of metrics :)