Service Desk Tomcat/javaw.exe takes 100% CPU when starts

Products

• CA Service Management - Service Desk Manager

Issue/Introduction

One thing Service Desk administrators observe is that when SDM starts, its Tomcat instances/javaw.exe take 100% CPU for certainly period of time. Depending on the machine available memory, this period of time could last 

between 2-3 minutes to 10-15 minutes and in some cases even a little longer. SDM admins may think this is not normal and may be wondering what could go wrong. The techdoc will explain that this is expected and normal behavior. 

Environment

Release : 17.3

Component : SERVICE DESK MANAGER

Resolution

This is expected and normal behavior.

The reason is the Tomcat instances would need to load a lot of libs/jars into their memory and they would try to grab as much memory as possible which will result in a period that the CPU is at 100% level. The more memory the shorter this period

will last therefore if possible more memory should be added to SDM server(for example, 26 G or 24 G). Also, SDM admins would need to recycle SDM after work hours like midnight or weekend so this won't impact end users.