_metrics index does not show up on out DMC Index Detailing page or Manager node Indexer Clustering page?

[splunkreal]

Hello,

_metrics is written on our clustered indexers since latest Splunk versions however it's not shown on our DMC Index Detail page  or Manager node Indexer Clustering page.

I think repFactor=0 by default so it means it's not replicated? Is it really used by Splunk? DMC? Internal usage only?

Should we declare it on our clustered indexers like any other user index?

Thanks for your help.

Splunk Enterprise 8.2.2