From: Michael Stone <mstone+postgres@mathom.us>
To: pgsql-performance@postgresql.org
Subject: Re: Cheap RAM disk?
Date: Tue, 26 Jul 2005 14:33:43 -0400
Message-ID: <20050726183343.GZ19080@mathom.us> (raw)
In-Reply-To: <BF0BCDAB.9FC9%llonergan@greenplum.com>
References: <42E6661D.3060304@arbash-meinel.com>
<BF0BCDAB.9FC9%llonergan@greenplum.com>
On Tue, Jul 26, 2005 at 11:23:23AM -0700, Luke Lonergan wrote:
>Yup - interesting and very niche product - it seems like it's only obvious
>application is for the Postgresql WAL problem :-)
On the contrary--it's not obvious that it is an ideal fit for a WAL. A
ram disk like this is optimized for highly random access applications.
The WAL is a single sequential writer. If you're in the kind of market
that needs a really high performance WAL you'd be much better served by
putting a big NVRAM cache in front of a fast disk array than by buying a
toy like this.
Mike Stone
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To: pgsql-performance@postgresql.org
Cc: mstone+postgres@mathom.us
Subject: Re: Cheap RAM disk?
In-Reply-To: <20050726183343.GZ19080@mathom.us>
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