Re: Performance options for CPU bound multi-SUM query

Matt <bsg075@gmail.com> wrote:

> I have a warehousing case where data is bucketed by a key of an hourly
> timestamp and 3 other columns. In addition there are 32 numeric columns. The
> tables are partitioned on regular date ranges, and aggregated to the lowest
> resolution usable.
>
> The principal use case is to select over a range of dates or hours, filter by
> the other key columns, and SUM() all 32 of the other columns. The execution
> plan shows the primary key index limits row selection efficiently, but the
> query appears CPU bound in performing all of those 32 SUM() aggregates.
>
> I am looking at a couple of distributed PostgreSQL forks, but until those reach
> feature parity with 9.5 I am hoping to stay with single node PostgreSQL.
>
> Are there any other options I can use to improve query times?

Maybe cybertec's agg() - patch, see
http://www.cybertec.at/postgresql_produkte/agg-parallele-aggregierungen-fuer-postgresql/

(and ask Hans for an english docu!)

But, i see, it needs 9.5.


Andreas
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