| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Greg Stark <stark(at)mit(dot)edu>, Peter Geoghegan <pg(at)heroku(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Misaligned BufferDescriptors causing major performance problems on AMD |
| Date: | 2015-01-27 00:58:25 |
| Message-ID: | 20150127005825.GA17219@momjian.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Tue, Jan 27, 2015 at 01:43:41AM +0100, Andres Freund wrote:
> master + 32align.patch:
> -c max_connections=400
> tps = 183791.872359 (high run vs. run variability)
> -c max_connections=401
> tps = 185494.98244 (high run vs. run variability)
>
> master + 64align.patch:
> -c max_connections=400
> tps = 489257.195570
> -c max_connections=401
> tps = 490496.520632
>
> Pretty much as expected, rigth?
Yes, I am convinced. Let's work on a patch now.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ Everyone has their own god. +
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