Rasdaemon is a RAS (Reliability, Availability and Serviceability) logging tool. It records memory errors, using the EDAC tracing events. EDAC is a Linux kernel subsystem with handles detection of ECC errors from memory controllers for most chipsets on i386 and x86_64 architectures. EDAC drivers for other architectures like arm also exists.
I find myself having to delete /var/lib/rasdaemon/ras-mc_event.db manually.
ras-mc-ctl --flush-errors
would be more convenient.