Huge CPU overhead with agent enabled

Products

• CA Application Performance Management Agent (APM / Wily / Introscope)
• CA Application Performance Management (APM / Wily / Introscope)
• INTROSCOPE
• DX Application Performance Management

Issue/Introduction

APM 10.7 agent is working fine on running Weblogic 12.2.1.2. However after upgrade to Weblogic 12.2.1.4, the agent is causing CPU overhead compared to the older WL version. The new WL runs on the same server so everything is the same (the app, the environment, the Hardware), only the WL version is different and it causes this huge overhead with enabled agent. if the agent is disabled the agent, the overhead disappears.

 

 

 

 

Environment

Release : 10.7.0

Component : APM Agents

Resolution

We disabled following agent features which seems to improve performance.

https://knowledge.broadcom.com/external/article?articleId=145354 -> disabled all items of step 5.
additionally disabled following feature:
introscope.agent.acc.enable=false
disable the Platform monitor.
disable all extension in ./extensions directory.
disabled jms.pbd

These above steps improved performance.