Contents

1   Introduction

This instruction concerns alarm handling.

1.1   Alarm Description

The alarm is raised by the Multimedia Application Server (MMAS) as part of overload protection when the heap memory load exceeds a configured threshold value.

The possible alarm causes and fault locations are explained in Table 1.

Table 1    Alarm Causes

Alarm Cause	Description	Fault Reason	Fault Location	Impact
Heap memory load exceeds maximum threshold value	Heap memory load exceeds the maxLowerThresholdValue or maxUpperThresholdValue threshold value	System is not dimensioned to handle the engineered capacity	Heap memory	A 503 Service Unavailable HTTP error containing a Retry-After header using a value three times higher than the value specified for attribute retryAfterInterval

The alarm attributes are listed and explained in Table 2.

Table 2    Alarm Attributes

Attribute Name	Attribute Value
Major Type	193
Minor Type	835860718
Managed Object Class	MmasOLPMem
Managed Object Instance	ManagedElement=<node_name>,Mmas=1,MmasOLPService=1,MmasOLPMem=1
Specific Problem	MMAS, Heap Memory Load Limit Exceeded
Event Type	processingErrorAlarm (4)
Probable Cause	x736UnspecifiedReason (418)
Additional Text	MMAS, Heap Memory Load Limit Exceeded
Perceived Severity	critical (3)

1.2   Prerequisites

This section provides information on the documents, tools, and conditions that apply to the procedure.

1.2.1   Documents

This instruction references the following document:

• Data Collection Guideline

1.2.2   Tools

No tools are required.

1.2.3   Conditions

Before starting this procedure, ensure that the following conditions are met:

• An MMAS, Heap Memory Load Limit Exceeded alarm is raised.
• An Ericsson Command-Line Interface (ECLI) session in Exec mode is in progress.

2   Procedure

Do the following:

1. Navigate to the MmasOLPService managed object, for example:

   >dn ManagedElement=NODE06ST,Mmas=1,MmasOLPService=1

2. View the heap memory overload protection configuration:

   (MmasOLPService=1)> show -r

   The following is an example output:

   MmasOLPService=1 enable=true [...] MmasOLPMem=1 activationAlgorithm=CONSECUTIVE deactivationAlgorithm=MEAN enable=true lowerThresholdValue=85 maxLowerThresholdValue=92 maxSamplingRate=10 maxUpperThresholdValue=94 measuringPeriod=100 [...] upperThresholdValue=90

3. Provide configuration information and order the planning department to replan the setting.
4. Perform data collection, refer to Data Collection Guideline.
5. Consult the next level of maintenance support. Further actions are outside the scope of this instruction.
6. Job is completed.