Re: Performance degradation in commit ac1d794 - Mailing list pgsql-hackers

From Andres Freund
Subject Re: Performance degradation in commit ac1d794
Date
Msg-id 20160321114620.ow5gtbxxgywr7afc@alap3.anarazel.de
Whole thread Raw
In response to Performance degradation in commit ac1d794  (Васильев Дмитрий<d.vasilyev@postgrespro.ru>)
List pgsql-hackers
Hi,

I've pushed the new API. We might want to use it in more places...

On 2015-12-25 20:08:15 +0300, Васильев Дмитрий wrote:
> I suddenly found commit ac1d794 gives up to 3 times performance degradation.
> 
> I tried to run pgbench -s 1000 -j 48 -c 48 -S -M prepared on 70 CPU-core
> machine:
> commit ac1d794 gives me 363,474 tps
> and previous commit a05dc4d gives me 956,146
> and master( 3d0c50f ) with revert ac1d794 gives me 969,265

Could you please verify that the performance figures are good now? I've
tested this on a larger two socket system, and there I managed to found
a configuration showing the slowdown (-c64 -j4), and I confirmed the
fix.

Regards,

Andres



pgsql-hackers by date:

Previous
From: Stas Kelvich
Date:
Subject: Re: fd.c: flush data problems on osx
Next
From: Andres Freund
Date:
Subject: Re: fd.c: flush data problems on osx