Add prometheus metrics for vacuum engine

timescale / promscale

[DEPRECATED] Promscale is a unified metric and trace observability backend for Prometheus, Jaeger and OpenTelemetry built on PostgreSQL and TimescaleDB.

https://www.timescale.com/promscale

Apache License 2.0

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Add prometheus metrics for vacuum engine #1754

Closed jgpruitt closed 2 years ago

jgpruitt commented 2 years ago

Add prometheus metrics for the vacuum engine so we can more easily observe its behavior

add a gauge for the number of tables left to vacuum
add a counter for the number of tables vacuumed