| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Peter Geoghegan <pg(at)heroku(dot)com> |
| Cc: | Christian Kruse <christian(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Wait free LW_SHARED acquisition |
| Date: | 2014-02-04 19:50:19 |
| Message-ID: | 20140204195019.GI32407@alap3.anarazel.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On 2014-02-04 11:48:14 -0800, Peter Geoghegan wrote:
> On Tue, Feb 4, 2014 at 11:39 AM, Christian Kruse
> <christian(at)2ndquadrant(dot)com> wrote:
> > I added -M prepared to the pgbench call in the benchwarmer script.
> >
> > The read-only tests are finished, I come to similiar results as yours:
> >
> > <http://wwwtech.de/pg/benchmarks-lwlock-read-only/>
>
> Note that Christian ran this test with max_connections=201, presumably
> to exercise the alignment problem.
I think he has applied the patch to hack around the alignment issue I
pushed to git for both branches. It's not nice enough to be applied yet,
but it should fix the issue.
I think the 201 is just a remembrance of debugging the issue.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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