POV-Ray : Newsgroups : povray.newusers : Problems with large RAM installed : Re: Problems with large RAM installed Server Time
10 Dec 2023 11:42:15 EST (-0500)
  Re: Problems with large RAM installed  
From: Mirfaelltkeinerein
Date: 10 Feb 2020 10:55:00
Message: <web.5e417bd1187cae06ee75e2ca0@news.povray.org>
"Mirfaelltkeinerein" <nomail@nomail> wrote:
> "Mirfaelltkeinerein" <nomail@nomail> wrote:
> > Hi all,
> >
> > I experienced a problem after upgrading a server from 1TB RAM to 2TB RAM (yes,
> > really RAM) in our dual socket AMD EPYC machine with 48 cores/96 threads under
> > Windows Server 2016. If I render a scene with 3500x1750 pixel, half of the cores
> > are used (Windows processor group stuff) and the performance is quite nice. If I
> > increase the resolution to 3600x1800 pixel (or more), it starts with 48
> > threads/24 cores, but performance is bad and after several seconds, just one
> > core/thread is doing all the work. Rendering can also not be stopped and runs
> > till the end.
> > I never experienced such a problem before. Do you have any ideas?
> Sorry, I posted the message into the wrong group. Could an Admin move it to the
> Windows group?
> By the way, it doesn't happen, if I restrict the rendered area to the first 1000
> rows for example, so it might be an scheduling issue with the total number of
> pixels to be rendered.

It still does happen for larger resolutions like 3800x1900 pixel even with
restricted render region.

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