Re: Wait free LW_SHARED acquisition

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 20:03:15
Message-ID: db6be318-434e-45c3-9d90-f26f3bd9e3ce@email.android.com
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On February 4, 2014 8:53:36 PM CET, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
>On Tue, Feb 4, 2014 at 11:50 AM, Andres Freund <andres(at)2ndquadrant(dot)com>
>wrote:
>> 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.
>
>I guess that given that *both* cases tested had the patch applied,
>that makes sense. However, I would have liked to see a real master
>baseline.

Christian, could you rerun with master (the commit on which the branch is based on), the alignment patch, and then the lwlock patch? Best with max_connections 200.
That's probably more important than the write tests as a first step..

Thanks,
Andres

--
Please excuse brevity and formatting - I am writing this on my mobile phone.

Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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