Re: Synchronous Log Shipping Replication

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Bruce Momjian <bruce(at)momjian(dot)us>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Markus Wanner <markus(at)bluegap(dot)ch>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Synchronous Log Shipping Replication
Date: 2008-09-09 09:35:35
Message-ID: 1220952935.3913.389.camel@ebony.2ndQuadrant
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On Tue, 2008-09-09 at 12:24 +0300, Heikki Linnakangas wrote:
> Simon Riggs wrote:
> > This gives us the Group Commit feature also, even if we are not using
> > replication. So we can drop the commit_delay stuff.
> Huh? How does that give us group commit?

Multiple backends waiting while we perform a write. Commits then happen
as a group (to WAL at least), hence Group Commit.

Simon Riggs
PostgreSQL Training, Services and Support

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