Can you create a heap dump when you start to experience the problems? If it's OOME, use -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/path/to/heap-dump.hprof , otherwise use jmap. Then try to find out excessive instance counts through Eclipse MAT Eclipse Memory Analyzer Open Source Project
SingleFileStore uses concurrent hash map with all keys, therefore memory consumption should be linear.
The problem is what during startup Infinispan create index for every and each entry and that blocks the startup of the process
Is there any option / solution to avoid this?