From: | Cal Heldenbrand <cal(at)fbsdata(dot)com> |
---|---|
To: | John R Pierce <pierce(at)hogranch(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Querying a time range across multiple partitions |
Date: | 2014-09-05 21:50:53 |
Message-ID: | CAAcwKhfJ8OQ-e_0xmZ-NJPJ1OxR=_qzwQf4yfw0mVYqM7WZLEA@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-general |
This particular use case is for user behavior data mining. The hardware is
beefy, and has tablespaces split out onto SSD/spindle for new & old data.
All of my queries are pretty much a nightly cron process, and I don't
really care too much about the speed. Scanning the full 4 years of data
takes about 30 seconds per query anyway... but I thought it'd be nice to
speed it up when the difference is milliseconds vs 30 seconds.
On Fri, Sep 5, 2014 at 4:17 PM, John R Pierce <pierce(at)hogranch(dot)com> wrote:
> On 9/5/2014 10:31 AM, Cal Heldenbrand wrote:
>
> Number of child tables: 1581
>
>
> that's an insane number of children. We try and limit it to 50 or so
> child tables, for instance, 6 months retention by week, of data will
> millions of rows/day.
>
>
>
> --
> john r pierce 37N 122W
> somewhere on the middle of the left coast
>
>
From | Date | Subject | |
---|---|---|---|
Next Message | Adrian Klaver | 2014-09-05 22:09:04 | Re: [GENERAL] Re: Cannot retrieve images inserted through VB and odbc, after a table reorganization. |
Previous Message | Cal Heldenbrand | 2014-09-05 21:45:34 | Re: Querying a time range across multiple partitions |