Re: Some ideas about Vacuum

On Wed, 16 Jan 2008, Alvaro Herrera wrote:

> Keep in mind that there are claims that a write-cache-enabled
> battery-backed RAID controller negates the effect of a separate spindle.

"Negates" is a bit strong; there's still some performance advantage on 
systems that write a serious amount of data.  It's certainly true that a 
BCC controller greatly reduces the need for a separate spindle.

It can be handy to keep it seperate anyway because it makes it trivial to 
track WAL I/O vs. database I/O.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD