From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
---|---|
To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
Cc: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: CLOG contention, part 2 |
Date: | 2012-02-28 19:21:41 |
Message-ID: | CA+U5nM+A24Pt3iAMNqzubezd3r7--Pt2TK1RZDpgDjH2r0A6kw@mail.gmail.com |
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Lists: | pgsql-hackers |
On Tue, Feb 28, 2012 at 6:11 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Mon, Feb 27, 2012 at 4:03 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>> So please use a scale factor that the hardware can cope with.
>
> OK. I tested this out on Nate Boley's 32-core AMD machine, using
> scale factor 100 and scale factor 300. I initialized it with Simon's
> patch, which should have the effect of rendering the entire table
> unhinted and giving each row a different XID.
Thanks for making the test.
I think this tells me the only real way to do this kind of testing is
not at arms length from a test machine.
So time to get my hands on a machine, but not for this release.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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