s I said in the original message, pg_stat_statements only gives query stats for the whole database. What I want to know, is information about each client. Say there's a specific connection from 192.168.1.20. I want to know:
* How many queries that connection has executed. * How much CPU time that connection has used since it connected. * How much data was sent to that connection. * How much data that connection sent to the database.
And so on. I don't believe that's currently possible. Effectively, it would just be adding a few more columns to pg_stat_activity to track cumulative totals, since it always has the status of all connections.
I don't know any tools off-hand, but you might be able to generate partial statistics from the log files with a descriptive log_line_prefix like "%m [%p] (user=%u) (db=%d) (rhost=%h) [vxid:%v txid:%x] [%i] ". Using the %p and vxi/txid might help to group the queries executed for easier consumption. I don't think that helps much with individual connections though.