Message on restart:
```
462 - Uncorrectable Memory Error Threshold Exceeded (Processor 2, DIMM 4). The
DIMM is mapped out and is currently not available.
Action: Take corrective action for the failing DIMM. Re-map all DIMMs back into
the memory map in RBSU. If the issue persists, contact support.
511 - One or more DIMMs have been mapped out due to a memory error, resulting
in an unbalanced memory configuration across memory controllers. This may
result in non-optimal memory performance.
Action: See the Integrated Management Log (IML) for information on the memory
error. Consult documentation for memory population guidelines.
```
HW logs:
```
/system1/log1/record38
Targets
Properties
number=38
severity=Critical
date=05/12/2020
time=01:50:28
description=Uncorrectable Machine Check Exception (Processor 2, APIC ID 0x00000022, Bank 0x00000008, Status 0xBC000000'01010091, Address 0x00000044'78E5EF40, Misc 0x200405C2'88202086).
Verbs
/system1/log1/record39
Targets
Properties
number=39
severity=Critical
date=05/12/2020
time=01:50:28
description=DIMM Failure - Uncorrectable Memory Error (Processor 2, DIMM 4)
/system1/log1/record40
Targets
Properties
number=40
severity=Critical
date=05/12/2020
time=01:50:52
description=Uncorrectable Memory Error Threshold Exceeded (Processor 2, DIMM 4). The DIMM is mapped out and is currently not available.
Verbs
/system1/log1/record41
Targets
Properties
number=41
severity=Informational
date=05/12/2020
time=01:54:52
description=One or more DIMMs have been mapped out due to a memory error, resulting in an unbalanced memory configuration across memory controllers. This may result in non-optimal memory performance.
Verbs
cd version exit show
/system1/log1/record42
Targets
Properties
number=42
severity=Repaired
date=05/12/2020
time=01:56:07
description=HPE Ethernet 1Gb 4-port 331i Adapter - NIC Connectivity status changed to OK for adapter in slot 0, port 1
Verbs
cd version exit show
```
This seems the same as T225378#5245612, but a different dimm is complaining this time.
Previous summary:
```
01:54 <+icinga-wm> PROBLEM - Host db2097 is DOWN: PING CRITICAL - Packet loss = 100%
01:56 <+icinga-wm> RECOVERY - Host db2097 is UP: PING OK - Packet loss = 0%, RTA = 36.19 ms
01:59 <+icinga-wm> PROBLEM - MariaDB read only s6 on db2097 is CRITICAL: Could not connect to localhost:3316 https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting
01:59 <+icinga-wm> PROBLEM - MariaDB Slave IO: s1 on db2097 is CRITICAL: CRITICAL slave_io_state could not connect https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_slave
02:00 <+icinga-wm> PROBLEM - MariaDB Slave IO: s6 on db2097 is CRITICAL: CRITICAL slave_io_state could not connect https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_slave
02:00 <+icinga-wm> PROBLEM - mysqld processes on db2097 is CRITICAL: PROCS CRITICAL: 0 processes with command name mysqld https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting
02:00 <+icinga-wm> PROBLEM - MariaDB Slave SQL: s1 on db2097 is CRITICAL: CRITICAL slave_sql_state could not connect https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_slave
02:02 <+icinga-wm> PROBLEM - MariaDB Slave SQL: s6 on db2097 is CRITICAL: CRITICAL slave_sql_state could not connect https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_slave
02:04 <+icinga-wm> PROBLEM - MariaDB read only s1 on db2097 is CRITICAL: Could not connect to localhost:3311 https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting
02:10 <+icinga-wm> PROBLEM - MariaDB Slave Lag: s6 on db2097 is CRITICAL: CRITICAL slave_sql_lag could not connect https://wikitech.wikimedia.org/wiki/MariaDB/troubleshooting%23Depooling_a_slave
```