Thread: Log number of tuples returned

Log number of tuples returned

From

Edson Richter

Date:

29 April 2021, 18:01:29

Hi!

Which postgresql logging parameters should I activate to log the “number of tuples returned” for a query?

I would like to debug some dynamicly generated queries in the system that are returning a absurd number of tuples (> 2,6mi of records).

Thanks,

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Re: Log number of tuples returned

From

Justin Pryzby

Date:

29 April 2021, 18:08:26

On Thu, Apr 29, 2021 at 03:01:29PM +0000, Edson Richter wrote:
> Which postgresql logging parameters should I activate to log the “number of tuples returned” for a query?
> I would like to debug some dynamicly generated queries in the system that are returning a absurd number of tuples (>
2,6miof records).
 

You can load the auto_explain extension and set:
auto_explain.log_analyze

And then the "rows" are logged:
          
 
 Result  (cost=0.00..0.01 rows=1 width=4) (actual time=0.002..0.004 rows=1 loops=1)
                      
 

https://www.postgresql.org/docs/current/auto-explain.html

-- 
Justin

RES: Log number of tuples returned

From

Edson Richter

Date:

29 April 2021, 18:31:04

De: Justin Pryzby
Enviado:quinta-feira, 29 de abril de 2021 12:08
Para: Edson Richter
Cc:pgsql-performance@lists.postgresql.org
Assunto: Re: Log number of tuples returned

On Thu, Apr 29, 2021 at 03:01:29PM +0000, Edson Richter wrote:
> Which postgresql logging parameters should I activate to log the “number of tuples returned” for a query?
> I would like to debug some dynamicly generated queries in the system that are returning a absurd number of tuples (> 2,6mi of records).

You can load the auto_explain extension and set:
auto_explain.log_analyze

And then the "rows" are logged:
Result (cost=0.00..0.01 rows=1 width=4) (actual time=0.002..0.004 rows=1 loops=1)

https://www.postgresql.org/docs/current/auto-explain.html

--
Justin

Perfect, Thanks!

ER.