ISIM Application Slow Performance after APM instrumentation

Products

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

Issue/Introduction

Trying to instrument IBM Security Identity Manager(ISIM). This application is deployed on WebSphere Application server. 
 It looks as the ISIM application has slowed down drastically after the APM instrumentation. 

Environment

Introscope Agent Release 10.7.0.45,
Operating System: RHEL 6
WebSphere Server
IBM Security Identity Manager(ISIM)
 

Cause

IBM J9 JDK 1.6 causes class redefinition and retransformation lead to performance issues. 

Resolution

Per Engineering, with an IBM J9 JVM, consider  replacing the primary Agent.jar and IntroscopeAgent.profile files with modified versions, AgentNoRedefNoRetrans.jar and IntroscopeAgentNoRedef.profile, to avoid performance issues. Consider the following guidelines:

• IBM J9 JVM with JRE 1.6.0: It is required to use the AgentNoRedefNoRetrans.jar file instead of Agent.jar.

Additional Information

https://docops.ca.com/ca-apm/10-7/en/implementing-agents/java-agent/install-the-java-agent/configure-application-server-to-use-the-java-agent