How to disable full GC triggered by System.gc()

Products

• STARTER PACK-7
• CA Rapid App Security
• CA API Gateway
• API SECURITY
• CA Mobile API Gateway

Issue/Introduction

Customer has a problem with commercial servers. Full GC occurs every 20 minutes. GC occurs and response time increases by 2-3 seconds. 

Environment

Release:
Component: APIGTW

Resolution

from the gc log, the frequent full gc are triggered by System.gc(), add the following java option can disable it,
-XX:+DisableExplicitGC

Steps: 

1. vi /opt/SecureSpan/Gateway/node/default/etc/conf/node.properties 
2. add one line 
   node.java.opts = -XX:+DisableExplicitGC
3. restart the ssg to take effect.
4. Do the same on all the nodes