SNMP Trap: Disk Latency¶
A trap is generated when the disk appear to be slow.
Identification
The originating IP / hostname is used to identify the system generating the traps
The NMS is responsible for associating traps with each managed system, along with clearing of alarms and escalation to the relevant system operator
The trap OID is generic for various SNMP events monitored by the system
The SNMP system name is included as part of the variable binding to assist identification:
.iso.org.dod.internet.mgmt.mib-2.system.sysName.0 = standalone
Trap OID
.iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotifications.mteTriggerFired
Variable Bindings - Disk slow
.iso.org.dod.internet.mgmt.mib-2.system.sysUpTime.0 = 2 minutes (12065)
snmpTrapOID = mteTriggerFired
.iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotificationObjects.mteHotTrigger.0 = ‘ERROR: Disk slow’
.iso.org.dod.internet.mgmt.mib-2.dismanEventMIB.dismanEventMIBNotificationPrefix. dismanEventMIBNotificationObjects.mteHotValue.0 = 1
.iso.org.dod.internet.mgmt.mib-2.system.sysName.0 = standalone
Severity Message¶
Info : INFO: The disk latency returned to normal
Critical : ERROR: Disk slow
INFO Example¶
Notification message from (1, 3, 6, 1, 6, 1, 1):('192.22.21.124', 38416):
Var-binds:
1.3.6.1.2.1.1.3.0 = 24804469
1.3.6.1.6.3.1.1.4.1.0 = 1.3.6.1.2.1.88.2.0.1
1.3.6.1.2.1.88.2.1.1.0 = INFO: The disk latency is normal
1.3.6.1.2.1.88.2.1.3.0 = The disk latency is normal.
1.3.6.1.2.1.88.2.1.5.0 = 0
1.3.6.1.2.1.1.5.0 = UN1-192.22.21.124
Resolution:
None. This trap will only appear to state that the heavy disk activity has receded and that the disk is operating as per normal.
Critical Example¶
Notification message from (1, 3, 6, 1, 6, 1, 1):('192.22.21.124', 53997):
Var-binds:
1.3.6.1.2.1.1.3.0 = 52188064
1.3.6.1.6.3.1.1.4.1.0 = 1.3.6.1.2.1.88.2.0.1
1.3.6.1.2.1.88.2.1.1.0 = ERROR: Disk slow
1.3.6.1.2.1.88.2.1.3.0 = Disk latency info: True
1.3.6.1.2.1.88.2.1.5.0 = 1
1.3.6.1.2.1.1.5.0 = UN1-192.22.21.124
Resolution:
This trap indicates that there is heavy disk activity. This will be normal in many situations and should not always require immediate action. The one reason for this is that there are many transactions spawned at the same time. The disk uitilization can be relieved by cancelling a few current transactions or by rescheduling some others.
However, this should be monitored closely and should it persist over several hours then Support should be contacted to investigate.