| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, Emre Hasegeli <emre(at)hasegeli(dot)com> |
| Subject: | Re: Better tracking of free space during SP-GiST index build |
| Date: | 2016-09-28 18:11:02 |
| Message-ID: | 18552.1475086262@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Thu, Sep 22, 2016 at 1:37 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> OK, I'll think about how to do that more efficiently. The smaller
>> incremental improvement isn't surprising, because in this example the
>> index would still be 90-something MB if it had no free space at all,
>> so there's going to be decreasing returns from any additional work
>> to avoid wasted free space. But if we can do it cheaply, this does
>> suggest that using pages in order by free space is of value.
> Tom, are you planning to do something about this patch yet this
> CommitFest, or leave it until later?
I doubt I will get to it this week, so let's mark it RWF for this fest.
regards, tom lane
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