pg_stat_database_tup_fetched metrics in postgres-exporter

[Tamar]

Hi,

I am trying to  understand the metrics "pg_stat_database_tup_fetched" which exists for the postgres-exporter metrics.

The HELP says:

# HELP pg_stat_database_tup_fetched Number of rows fetched by queries in this database # TYPE pg_stat_database_tup_fetched counter 

If I put this metrics into a graph over time - does'nt look like this much data is selected in the last 6 hours in my almost idle test DB.

So what does this counter represents over time?

Thanks,

Tamar