Re: Profile what the production server is doing

Am 23.07.2018 um 13:38 schrieb Julien Rouhaud:
> Hi,
> 
> On Mon, Jul 23, 2018 at 1:18 PM, Thomas Güttler
> <guettliml@thomas-guettler.de> wrote:
>> Is there a tool which does this for PostgreSQL?
>>
>> Take a "snapshot" of what the server is doing about 10 times per second.
>> Write this to a file.
>> After N hours you can aggregate the file.
>> What does the server do most of the time?
>> Which tables/index gets used the most.
>>
>> Before optimizing a database, I would like to know what is going
>> on in the production system.
>>
>> I know that there are internal tables like pg_stat_statements.
>> But I guess doing a snapshot every N millseconds will present a
>> better picture of what is going in in real life.
>>
>> Is there already a tool which goes this way?
> 
> You can look at powa (https://powa.readthedocs.io/) which aims to
> provide this kind of information.
> 

AFAIK powa is based on pg_stat_statements not on statistical samples.
But maye I am wrong.

Regards,
   Thomas Güttler

-- 
Thomas Guettler http://www.thomas-guettler.de/
I am looking for feedback: https://github.com/guettli/programming-guidelines