Re: unreliable behaviour of track_functions

On 03/31/2018 05:17 PM, pinker wrote:
> Adrian Klaver-4 wrote
>> https://www.postgresql.org/docs/10/static/monitoring-stats.html#PG-STAT-USER-FUNCTIONS-VIEW
>>
>> "...But if you want to see new results with each query, be sure to do
>> the queries outside any transaction block. Alternatively, you can invoke
>> pg_stat_clear_snapshot(), which will discard the current transaction's
>> statistics snapshot (if any). The next use of statistical information
>> will cause a new snapshot to be fetched.
>>
>> A transaction can also see its own statistics (as yet untransmitted to
>> the collector) in the views pg_stat_xact_all_tables,
>> pg_stat_xact_sys_tables, pg_stat_xact_user_tables, and
>> pg_stat_xact_user_functions. These numbers do not act as stated above;
>> instead they update continuously throughout the transaction.
>>
>> "
>> Adrian Klaver
>
>> adrian.klaver@
>
>
> Thank you for that, but does this strange behaviour should not be better
> documented?

This came from the documentation, so I am not sure what you mean by
better documented?

> If somebody (like me, I have some time ago being unaware of this behaviour)
> wants to build a monitoring system that base on the view
> pg_stat_user_functions, should not be informed what to expect?

See comment above.

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> --
> Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com