How do I find the last time that a PostgreSQL database has been updated?

Question

I am working with a postgreSQL database that gets updated in batches. I need to know when the last time that the database (or a table in the database)has been updated or modifie

Answer 1

I like Jack's approach. You can query the table stats and know the number of inserts, updates, deletes and so:

select n_tup_upd from pg_stat_user_tables  where relname = 'YOUR_TABLE';

every update will increase the count by 1.

bare in mind this method is viable when you have a single DB. multiple instances will require different approach probably.