12c Agent consumes excessive CPU when running Qualys scan with high version counts (Doc ID 2119492.1)

Last updated on AUGUST 23, 2017

Applies to:

Enterprise Manager Base Platform - Version 12.1.0.4.0 and later
Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
IBM: Linux on System z
Linux x86-64

Symptoms

When Qualys scan (www.qualys.com - scan network for security threats) is run on zLinux server with OEM 12c Agent, causes agent to consume excessive CPU and stops server.

There were several instances of zLinux OEM agent on main production servers consuming upwards of 400% CPU,
and this brings the database to a halt and eventually the agent has to be restarted to release CPU resources.

EM 12.1.0.4.0 Agent patched to EM Bundle Patch 12.1.0.4.10 (21168025) running on zlinux (IBM: Linux on System z).

This CPU resource shortage issue will bring main production system to a halt, and can not process overnight batch work and will breach customer SLAs.

This occurs with JDBC patch 18502187, recommended by notes, 1909576.1 and 1474263.1. 

Cause

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