pg_stat_database_conflicts_confl_* merge into one metric with labels?

[baryluk]

pg_stat_database_conflicts_confl_bufferpin
pg_stat_database_conflicts_confl_deadlock
pg_stat_database_conflicts_confl_lock
pg_stat_database_conflicts_confl_snapshot
pg_stat_database_conflicts_confl_tablespace

->

pg_stat_database_conflicts_by_type{conflict_type=bufferpin,deadlock,lock,snapshot,tablespace}

It feels it is quicker and easier to build graphs this way, and compare values, as well compute sums.

More of a wishlist / start of a discussion than an issue report.

[wrouesnel]

Feels like this would get into some complicated rule parsing which perhaps should happen elsewhere. pg_exporter tries to tamper with the names of values in postgres as little as possible (since Prometheus can do that itself).