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Dell R720 Alternate RTID (Requestor Transaction ID) enabled for VMware ESXi?

Posted on 2013-01-14
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We have a massive VMware farm that we are refreshing the hardware to Dell R720s. I am looking through the bios options and I found:

Alternate RTID (Requestor Transaction ID)
"Setting Description Allows you to allocate more RTIDs to remote sockets increasing the cache performance between sockets..."

Sounds like it might help increase I/O and thus be good for VMware Servers... anybody have experience / advice about this setting?
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Question by:Thaidog
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Danny McDaniel earned 2000 total points
ID: 38777048
I looked it up and found this:

BIOS Performance and Power Tuning Guidelines for Dell PowerEdge 12th Generation Servers

on p19:
Alternate RTID setting
This setting manipulates Requestor Transaction IDs, which are QPI resources. This option is disabled by default, and generally should be left at this setting, as no workloads have been identified as benefitting from the manipulation of this option.
NOTE: Enabling this option almost always results in negative impacts to overall system performance, and that few similarities exist between this option previous-generation architectures.
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