Re: Cheap RAM disk? - Mailing list pgsql-performance

From Michael Stone
Subject Re: Cheap RAM disk?
Date
Msg-id 20050726183343.GZ19080@mathom.us
Whole thread Raw
In response to Re: Cheap RAM disk?  ("Luke Lonergan" <llonergan@greenplum.com>)
Responses Re: Cheap RAM disk?  (Richard_D_Levine@raytheon.com)
List pgsql-performance
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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