Re: Better Connection Statistics

On Fri, Feb 7, 2014 at 2:24 PM, bricklen <bricklen(at)gmail(dot)com> wrote:

>
> On Fri, Feb 7, 2014 at 10:08 AM, Shaun Thomas <sthomas(at)optionshouse(dot)com>wrote:
>
>> 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.