| From: | Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com> |
|---|---|
| To: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Amit Kapila <amit(dot)kapila(at)enterprisedb(dot)com> |
| Subject: | Re: Combining Aggregates |
| Date: | 2016-01-21 02:53:01 |
| Message-ID: | CAJrrPGesjqBW6oNez3hVe+iBZwRvM=AsnaDQHdJEkXpGmGc4-A@mail.gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Thu, Jan 21, 2016 at 1:33 PM, Haribabu Kommi
<kommi(dot)haribabu(at)gmail(dot)com> wrote:
>
> Here I attached updated patch of parallel aggregate based on the latest
> changes in master. Still it lack of cost comparison of normal aggregate to
> parallel aggregate because of difficulty. This cost comparison is required
> in parallel aggregate as this is having some regression when the number
> of groups are less in the query plan.
>
Updated patch is attached after removing a warning in building group
aggregate path.
Regards,
Hari Babu
Fujitsu Australia
| Attachment | Content-Type | Size |
|---|---|---|
| parallelagg_poc_v5.patch | application/octet-stream | 35.4 KB |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Simon Riggs | 2016-01-21 03:08:15 | Re: Spurious standby query cancellations |
| Previous Message | Peter Eisentraut | 2016-01-21 02:33:58 | Re: [PATCH] better systemd integration |