Why is MySQL nearly twice as fast on Linux/AMD64 Vs. FreeBSD/AMD64?

[Brooks Davis]

On Tue, May 18, 2004 at 05:02:51PM -0700, JG wrote:
> At 06:28 PM 5/18/2004 -0500, you wrote:
> >JG wrote:
> >
> >>
> >>Dual AMD Opteron 240's (1.4ghz)
> >>Tyan S2882UGNR server-class motherboard w/LSI Zero channel Raid card.
> >>2 gigs PC-2700 registered ECC memory
> >>Seagate barracuda ATA 100 system drive
> >>RAID-0 Mysql drive composed of 2 15k RPM U160 SCSI Fujistu drives.
> >
> >
> >How is the memory laid out?  How many DIMMs, and are they evenly spread 
> >between the CPUs?
> 
> There are only (2) 1GB modules. They are laid out as the motherboard 
> suggests for this
> configuration - both modules on the CPU0 bank.  

I'd recommend replacing those 1GB modules with 4 512MB modules.  That
should yeild improved performance across the board by giving both CPUs
their own RAM.

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
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