| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Gregory Stark <stark(at)enterprisedb(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Plan time Improvement - 64bit bitmapset |
| Date: | 2009-06-10 11:40:30 |
| Message-ID: | 4A2F9BAE.2050208@anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 06/10/2009 01:38 PM, Gregory Stark wrote:
> Andres Freund<andres(at)anarazel(dot)de> writes:
>
>> Plan time (averaged) without change:
>> cnt: 40 (4 times per session)
>> avg: 4572ms
>>
>> Plan time (averaged) with change:
>> cnt: 40 (4 times per session)
>> avg: 4236ms
>>
>> ~7% difference. Same with higher number of repetitions and with most other
>> planner settings I tried
>
> What are you comparing here?
32bit and 64bit bitmapsets with the attached query. 32beeing the default
and the slower one.
Does that answer the question?
Andres
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