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.