Skip site navigation (1) Skip section navigation (2)

Re: PostgreSQL as a local in-memory cache

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Dimitri Fontaine <dfontaine(at)hi-media(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, postgres performance list <pgsql-performance(at)postgresql(dot)org>
Subject: Re: PostgreSQL as a local in-memory cache
Date: 2010-06-29 17:09:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Tue, Jun 29, 2010 at 9:32 AM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
> Robert Haas wrote:
>> On Mon, Jun 28, 2010 at 5:57 PM, Bruce Momjian <bruce(at)momjian(dot)us> wrote:
>> >> The patch also documents that synchronous_commit = false has
>> >> potential committed transaction loss from a database crash (as well as
>> >> an OS crash).
>> Is this actually true?
> I asked on IRC and was told it is true, and looking at the C code it
> looks true.  What synchronous_commit = false does is to delay writing
> the wal buffers to disk and fsyncing them, not just fsync, which is
> where the commit loss due to db process crash comes from.

Ah, I see.  Thanks.

Robert Haas
The Enterprise Postgres Company

In response to


pgsql-performance by date

Next:From: Bruce MomjianDate: 2010-06-29 17:19:40
Subject: Re: PostgreSQL as a local in-memory cache
Previous:From: Bruce MomjianDate: 2010-06-29 15:29:18
Subject: Re: cpu bound postgresql setup.

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group