I've been investigating some zero values in some tables tuples stats. By querying pg_stat_database view I can see reset times (pg_stat_database) that have not been performed by me (doing a SELECT pg_stat_reset())
My question is, what other actions or events may reset the stats of a DB?
I don't know if, somehow, having a busy server or with a high number of DBs may produce this effect.
Statistics will reset whenever we are stopping PostgreSQL Instance in IMMEDIATE mode.