[sciurus]

If you're looking for a metrics backend built on traditional Postgres, check out Tgres.

http://grisha.org/blog/2016/07/29/state-of-tgres-2016/

[GrayTShirt]

+1 for tgres https://github.com/tgres/tgres On an aside, I found his posts on holt-winters very informative.