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Re: Group commit, revised

From: Simon Riggs <simon(at)2ndquadrant(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Peter Geoghegan <peter(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PG Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Group commit, revised
Date: 2012-01-25 03:50:22
Message-ID: CA+U5nMLG91oFao4=O_WoMSgQ8ELEGxqTqqmXLzADt5XV-rAUpw@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Fri, Jan 20, 2012 at 10:30 PM, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:

> I spent some time cleaning this up. Details below, but here are the
> highlights:
>
> * Reverted the removal of wal_writer_delay
> * Removed heuristic on big flushes

No contested viewpoints on anything there.

> * Doesn't rely on WAL writer. Any process can act as the "leader" now.
> * Uses PGSemaphoreLock/Unlock instead of latches

Thanks for producing an alternate version, it will allow us to comment
on various approaches.

There is much yet to discuss so please don't think about committing
anything yet.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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