Horton

Re: WIP: Fast GiST index build

Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

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From: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>
To: Alexander Korotkov <aekorotkov@gmail.com>
Cc: Robert Haas <robertmhaas@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2011-08-30T10:41:00Z
Lists: pgsql-hackers 
On 30.08.2011 13:29, Alexander Korotkov wrote:
> On Tue, Aug 30, 2011 at 1:13 PM, Heikki Linnakangas<
> heikki.linnakangas@enterprisedb.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