Postgres Pro
Downloads
Home   >   mailing lists

how does PostgreSQL determine how many parallel processes to start - Mailing list pgsql-general

From Luca Ferrari
Subject how does PostgreSQL determine how many parallel processes to start
Date
Msg-id CAKoxK+61MVdABb2eQ_VLfvRT0hEX12dOkx6Bz9orS5VQ--UvVQ@mail.gmail.com
Whole thread Raw
Responses Re: how does PostgreSQL determine how many parallel processes to start  (Laurenz Albe <laurenz.albe@cybertec.at>)
List pgsql-general
Tree view 
Hi all,
I know that parallel processes can be limited by
max_parallel_workers_per_gather and max_parallel_workers, as well as
the condition to consider a parallel plan is min_table_scan_size (and
index). But I would like to understand, once a table has been
considered for a parallel plan, and there is room for other workers,
how will PostgreSQL decide to start another process?

Thanks,
Luca

pgsql-general by date:

Previous
From: Pavel Stehule
Date:
Subject: Re: Syntax checking DO blocks and ALTER TABLE statements?
Next
From: Laurenz Albe
Date:
Subject: Re: how does PostgreSQL determine how many parallel processes to start