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

[JG]

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.