Last month I wrote mention that our applications are facing challenges regarding scalability (see Strategies for Performance). One of the strategies mentioned was moving to a 64-bit operating system, Windows Server 2003 X64. Our observations are anecdotal, but the OS kicks ass...at least when compared to the 32 bit Windows Server 2003. Reports that were running for nearly 30 minutes are completing in less than two (minutes).
We recently rebuilt the server for a key customer onto X64. In moving them to the new OS, we made other improvements too. We upgraded their database to SQL Server 2005. We also realigned the storage, separating data and logs onto different physical drives. And changing those drives from RAID 5 to RAID 1.
All these changes will contribute to the performance improvement. We have restructured systems before, separating data from logs and changing RAID, but have only seen an incremental improvement in performance. It's a reasonable conclusion that the greatest improvement comes from x64.
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