We are seeing repeated EDAC errors in the logs
8848485.132443] EDAC MC1: 1 CE memory read error on CPU_SrcID#1_Ha#0_Chan#3_DIMM#0 (channel:3 slot:0 page:0x4e78bf offset:0xb40 grain:32 syndrome:0x0 - area:DRAM err_code:0001:0093 socket:1 ha:0 channel_mask:8 rank:0) [8848485.132444] EDAC sbridge MC1: HANDLING MCE MEMORY ERROR [8848485.132445] EDAC sbridge MC1: CPU 1: Machine Check Event: 0 Bank 11: 8800004400800093 [8848485.132446] EDAC sbridge MC1: TSC 0 [8848485.132446] EDAC sbridge MC1: ADDR 0 [8848485.132447] EDAC sbridge MC1: MISC 4900040004000800 [8848485.132448] EDAC sbridge MC1: PROCESSOR 0:206d7 TIME 1528575500 SOCKET 1 APIC 20
we should identify which RAM bank is faulty and swap it for a spare one, if we have any.