| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: WIP: Fast GiST index build |
| Date: | 2011-08-30 10:41:00 |
| Message-ID: | 4E5CBE3C.6030404@enterprisedb.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 30.08.2011 13:29, Alexander Korotkov wrote:
> On Tue, Aug 30, 2011 at 1:13 PM, Heikki Linnakangas<
> heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
>
>> So, over 50% of the CPU time is spent in choosing a block from the
>> temporary files. That should be pretty easy to improve..
>>
> Yes, probably we can just remove free blocks sorting.
I'm re-running the tests with that change now. It seems like using the
list of free blocks as a simple stack would be better anyway, it
probably yields a better cache hit ratio when we re-use blocks that have
just been released.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Heikki Linnakangas | 2011-08-30 10:43:23 | Re: WIP: Fast GiST index build |
| Previous Message | Pavan Deolasee | 2011-08-30 10:38:44 | Re: Single pass vacuum - take 2 |