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Re: CLOG contention, part 2

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 (view raw or flat)
Thread:
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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