Re: SV: Insertion time is very high for inserting data in postgres

On 2021-02-10 11:10:41 +0000, Niels Jespersen wrote:
> >Fra: prachi surangalikar <surangalikarprachi100(at)gmail(dot)com>
> >We are using Postgres 12.2.1 for fetching per minute data for about 25
> machines but running parallely via a single thread in python.
> >But suddenly the insertion time has increased to a very high level, about 30
>> second for one machine.
>
> >We are in so much problem as the data fetching is becoming slow.
>
> >if anyone could help us to solve this problem it would be of great help to us.
>
> Get your data into a Text.IO memory structure and then use copy https://
> www.psycopg.org/docs/usage.html#using-copy-to-and-copy-from
>
>
>
> This is THE way of high-performant inserts using Postgres.

True, but Prachi wrote that the insert times "suddenly ... increased to a
very high level". It's better to investigate what went wrong than to
blindly make some changes to the code.

As a first measure I would at least turn on statement logging and/or
pg_stat_statements to see which statements are slow, and then
investigate the slow statements further. auto_explain might also be
useful.

hp

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