I'm upping the RAM in one of our servers from 2GB to 4GB. Looking around in the BIOS, I see the following settings:
DRAM ECC Enable (Enabled) MCA DRAM ECC Logging (Disabled) ECC Chip Kill (Disable) DRAM Scrub Redirect (Disable) DRAM BG Scrub (Disabled) L2 Cache BG Scrub (Disabled) Data Cache BG Scrub (Disabled) IOMMU Mode (Disabled)
Should these be turned on? And for the background scrubbing options, various times are in nano and microseconds; how would one go about calculating the optimal time to use?
Additionally, IOMMU has an options for Best Fit and Absolute, and then allows me to set the aperture size in MB. What should this be set to? We're running VMWare Server on this box, so my basic understanding is that IOMMU is helpful, but don't know what the ideal aperture would be.