Problems with Performance of Oracle Java Cloud Service—Coherence Service Instances
Depending on access patterns and memory usage, an Oracle Java Cloud Service — Coherence instance might show performance problems under a heavy load. You might see long, multi-second garbage collection times on Managed Servers of the Coherence data tier. To address this issue, you can change the garbage collection scheme to CMS.
To change the garbage collection scheme on a Managed Server on the Coherence data tier: