Greg,
Well, I'm doing like "%stuff%" selects on a single column table
with 20 million records, so any speed gain would be great. Would
I be correct in saying that a select of this type will always do
a table scan?
I think I'll go with SCSI and increase the RAM so I can use a
heap table.
Thanks
Michael Thomas
> -----Original Message-----
> From: greg [mailto:greg]On Behalf Of Greg Cope
> Sent: Wednesday, February 07, 2001 4:09 PM
> To: mike thomas
> Cc: Mysql@Lists. Mysql. Com; [EMAIL PROTECTED]
> Subject: Re: Should I switch to SCSI HD for mysql?
>
>
> mike thomas wrote:
> >
> > Hi all
> >
> > I am running mysql on linux (redhat 6.2) using a regular 18Gb
> > EIDI hard drive. Does anyone know how much (ball
> park figure) a
> > SCSI hard drive would speed up selects and inserts?
>
> This is a how long is a piece of string question .....
>
> EIDE disks have nearly the same data transfer rates as
> SCSI drives.
>
> but
>
> SCSI drives have nearly twice the seek-time
> performance - or their
> average seek time is twice as good.
>
> So it depends on how many seeks a query takes to
> complete that will
> determine any performance increase. Each query will
> be atleast two IIRC
> from the manual - which has a section on Disk performance.
>
> If you are serious about performance go SCSI.
>
> Greg
>
> >
> > Thanks everyone!
> >
> > Michael Thomas
> > abcXyz.com
> > [EMAIL PROTECTED]
> >
> >
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