Обсуждение: Equivalent of Oracle's per-session statistics (v$client_stats)?

On Mar 22, 2016 6:14 PM, "Frits Jalvingh" <jal@etc.to> wrote:
>
> Hello list,
>
> Oracle has a way to get per-session statistics. You identify a session using a call to dbms_session.set_identifier('xxx'), then you enable statistics using dbms_monitor.client_id_stat_enable('xxx').
> After this you do normal database statements.
> Before you close the connection you can read a view, v$client_stats, which now contains all kinds of metrics specifically to your connection's use. Metrics that can be read are things like the number of logical blocks read, physical blocks read etc.
> Using this mechanism you can show exactly how "bad" for instance a screen from an application behaves, by finding out how much database I/O it does.
>
> I was wondering whether Postgresql has something like this? I looked at the pg_stats tables but I do not see anything that can be related to the "current session" or "current connection".
>

There aren't really any on a session basis but there are per transaction. Take a look at pg_stat_xact_*.

/Magnus