| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tomas Vondra <tomas(dot)vondra(at)enterprisedb(dot)com> |
| Cc: | "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Bruce Momjian <bruce(at)momjian(dot)us> |
| Subject: | Re: pgcon unconference / impact of block size on performance |
| Date: | 2022-06-07 16:26:01 |
| Message-ID: | CA+Tgmoa8WXoiQrgx0ovxR4iwtKAcfj-WfWaHSez4L1nRR7fcAQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sat, Jun 4, 2022 at 7:23 PM Tomas Vondra
<tomas(dot)vondra(at)enterprisedb(dot)com> wrote:
> This opened a long discussion about possible explanations - I claimed
> one of the main factors is the adoption of flash storage, due to pretty
> fundamental differences between HDD and SSD systems. But the discussion
> concluded with an agreement to continue investigating this, so here's an
> attempt to support the claim with some measurements/data.
Interesting. I wonder if the fact that x86 machines have a 4kB page
size matters here. It seems hard to be sure because it's not something
you can really change. But there are a few of your graphs where 4kB
spikes up above any higher or lower value, and maybe that's why?
--
Robert Haas
EDB: http://www.enterprisedb.com
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