Peak CPU Utilization Measurements Regularly Hit 100% For OAM Servers (Doc ID 2214161.1)

Last updated on DECEMBER 15, 2016

Applies to:

Oracle Communications Diameter Signaling Router (DSR) - Version DSR 5.0 and later
Information in this document applies to any platform.

Symptoms

OAM.SYSTEM MeasArrayed reports often show in the System.CPU_CoreUtilPct_Peak value hitting 100% for one or more Index entries (CPU Core number) on Operation, Administration, and Maintenance (OAM) servers, often appearing at regular intervals.

OAM.SYSTEM MeasSimple reports will show System.CPU_UtilPct_Peak values high, often above 80% at regular intervals.

No EventID 31215 'Process Resources Exceeded' or other utilization related alarms in the Alarm and Event reports are typically observed.

On the OAM server via command line, 'top -M -n 5' (will produce 5 samples over about 10s) command output shows Imysqld as a leading CPU consumer, often above 150%.

Changes

Possible changes include:  Feature activation; Software upgrade; Implementation of a kpi or report monitoring strategy.  Often the condition is noticed well after the change was made, since it mainly manifests in OAM.SYSTEM measurement reporting.

Cause

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