Re: Gather performance analysis - Mailing list pgsql-hackers

From Tomas Vondra
Subject Re: Gather performance analysis
Date
Msg-id abe1f1a7-82aa-873e-fb81-1ea7e2559d45@enterprisedb.com
Whole thread Raw
In response to Re: Gather performance analysis  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
On 9/24/21 1:43 AM, Robert Haas wrote:
> On Thu, Sep 23, 2021 at 5:36 PM Tomas Vondra
> <tomas.vondra@enterprisedb.com> wrote:
>> (c) This can't explain the slowdown for cases without any Gather nodes
>> (and it's ~17%, so unlikely due to binary layout).
> 
> Yeah, but none of the modified code would even execute in those cases,
> so it's either binary layout, something wrong in your test
> environment, or gremlins.
> 

I'm not going to the office all that often these days, but I think I'm 
sure I'd notice a bunch of gremlins running around ... so it's probably 
the binary layout thing. But still, strange.

regards

-- 
Tomas Vondra
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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