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I recently read this paper that @codinghorror twitted about, and I wonder how do I know that my server failed due to a memory error? Particularly, how do I know if it was a correctable or an uncorrectable error and on which DIMM it happened?

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3 Answers 3

up vote 2 down vote accepted

SNMP traps / messages are your best bet for having a pro-active notification about a memory/DIMM error. Products like HP Systems Insight Manager, HP OpenView, and Dell OpenManage offer several configurable rules to forward SNMP messages to emails/sms/pagers to let you know exactly when a memory error or degradation occurs.

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just use memtest! It will tell you exactly which DIMM is having problems. http://www.memtest86.com/

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Unfortunately, that required rebooting the server and having it offline while this runs. With ECC FBDIMMs, you can usually keep the server running normally even if there are faults, just with reduced performance. as mctsonic said, SNMP or other vendor-specific monitoring tools are probably the way to go here. –  MDMarra Sep 6 '09 at 0:53

Check the server's own diagnostics. As you've told us absolutely nothing about the server that's as detailed an answer as I can give.

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